hi, sorry i gotslightly confused with the log... here is the whole log now

~$ kupfer --debug | tee kupfer.log
Gtk-Message: Failed to load module "overlay-scrollbar"
D [kupfer.scheduler] Scheduler: Loading
D [kupfer.core.plugins]: Loading kupfer.plugin.applications
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/applications.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.applications.OpenWith>
D [kupfer.core.sources]: Add <kupfer.plugin.applications.SetDefaultApplication>
D [kupfer.core.sources] SourcePickler: Loading Applications from kOqeQrgq3epiIo0mjl6AuSw-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.applications.AppSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.archivemanager
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/archivemanager.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.archivemanager.UnpackHere>
D [kupfer.core.sources]: Add <kupfer.plugin.archivemanager.CreateArchive>
D [kupfer.core.sources]: Add <kupfer.plugin.archivemanager.CreateArchiveIn>
D [kupfer.core.plugins]: Loading kupfer.plugin.calculator
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/calculator.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.calculator.Calculate>
D [kupfer.core.plugins]: Loading kupfer.plugin.clipboard
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/clipboard.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.clipboard.ClearClipboards>
D [kupfer.core.sources] SourcePickler: Loading Clipboards from kLGWjsI1s1XOk4xJ-ffWrew-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.clipboard.ClipboardSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.commands
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/commands.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.commands.CommandTextSource Shell Commands>
D [kupfer.core.sources]: Add <kupfer.plugin.commands.PassToCommand>
D [kupfer.core.sources]: Add <kupfer.plugin.commands.FilterThroughCommand>
D [kupfer.core.sources]: Add <kupfer.plugin.commands.WriteToCommand>
D [kupfer.core.sources]: Add <kupfer.plugin.commands.PassToCommand>
D [kupfer.icons]: Loading icon kupfer-object at 24 for core
D [kupfer.icons]: Loading icon kupfer-object at 128 for core
D [kupfer.icons]: Loading icon kupfer-object-multiple at 24 for core
D [kupfer.icons]: Loading icon kupfer-object-multiple at 128 for core
D [kupfer.core.plugins]: Loading kupfer.plugin.core
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/core/__init__.pyc
D [kupfer.plugin_support]: Registered alternative icon_renderer: kupfer.plugin.core.gtk
D [kupfer.plugin_support]: Registered alternative terminal: kupfer.plugin.core.gnome-terminal
D [kupfer.plugin_support]: Registered alternative terminal: kupfer.plugin.core.xfce4-terminal
D [kupfer.plugin_support]: Registered alternative terminal: kupfer.plugin.core.lxterminal
D [kupfer.plugin_support]: Registered alternative terminal: kupfer.plugin.core.xterm
D [kupfer.plugin_support]: Registered alternative terminal: kupfer.plugin.core.urxvt
D [kupfer.core.sources]: Add <kupfer.plugin.core.text.BasicTextSource Text>
D [kupfer.core.sources]: Add <kupfer.plugin.core.text.PathTextSource Filesystem Text Matches>
D [kupfer.core.sources]: Add <kupfer.plugin.core.text.URLTextSource URL Text Matches>
D [kupfer.core.sources]: Add <kupfer.plugin.core.text.OpenTextUrl>
D [kupfer.core.sources]: Add <kupfer.plugin.core.Rescan>
D [kupfer.core.sources]: Add <kupfer.plugin.core.Rescan>
D [kupfer.core.sources]: Add <kupfer.plugin.core.commands.SaveToFile>
D [kupfer.core.sources]: Add <kupfer.plugin.core.SearchInside>
D [kupfer.core.sources]: Add <kupfer.plugin.core.CopyToClipboard>
D [kupfer.core.sources]: Add <kupfer.plugin.core.debug.DebugInfo>
D [kupfer.core.sources]: Add <kupfer.plugin.core.debug.Forget>
D [kupfer.core.sources]: Add <class 'kupfer.plugin.core.debug.ComposedSource'>
D [kupfer.core.sources]: Add <class 'kupfer.plugin.core.contents.KupferSource'>
D [kupfer.core.sources]: Add <kupfer.plugin.core.internal.CommandResults>
D [kupfer.core.sources]: Add <kupfer.plugin.core.contents.KupferSource>
D [kupfer.core.sources]: Add <kupfer.plugin.core.internal.KupferInterals>
D [kupfer.core.plugins]: Loading kupfer.plugin.customtheme
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/customtheme.pyc
D [kupfer.core.plugins]: Loading kupfer.plugin.dictionary
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/dictionary.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.dictionary.LookUp>
D [kupfer.core.plugins]: Loading kupfer.plugin.documents
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/documents.pyc
D [kupfer.core.sources]: Add <class 'kupfer.plugin.documents.ApplicationRecentsSource'>
D [kupfer.core.sources] SourcePickler: Loading Recent Items from kh1s869-UuevNA5beOCil-A-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.documents.RecentsSource>
D [kupfer.core.sources] SourcePickler: Loading Places from k8Hk5k3OHftF64ilNEl+r7w-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.documents.PlacesSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.epiphany
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/epiphany.pyc
D [kupfer.core.sources]: Add <class 'kupfer.plugin.epiphany.EpiphanySource'>
D [kupfer.core.sources] SourcePickler: Loading Epiphany Bookmarks from kwnO80AWV0vOatJAkeqDqFA-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.epiphany.EpiphanySource>
D [kupfer.core.plugins]: Loading kupfer.plugin.favorites
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/favorites.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.favorites.AddFavorite>
D [kupfer.core.sources]: Add <kupfer.plugin.favorites.RemoveFavorite>
D [kupfer.core.sources] SourceDataPickler: Loaded configuration from config-kupfer.plugin.favorites-v1.pickle
D [kupfer.core.sources]: Add <kupfer.plugin.favorites.FavoritesSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.fileactions
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/fileactions.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.fileactions.MoveTo>
D [kupfer.core.sources]: Add <kupfer.plugin.fileactions.Rename>
D [kupfer.core.sources]: Add <kupfer.plugin.fileactions.CopyTo>
D [kupfer.core.plugins]: Loading kupfer.plugin.firefox
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/firefox.pyc
D [kupfer.core.sources]: Add <class 'kupfer.plugin.firefox.BookmarksSource'>
D [kupfer.core.sources] SourcePickler: Loading Firefox Bookmarks from kSpYArkvL519Yjd6c5PMN+w-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.firefox.BookmarksSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.multihead
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/multihead.pyc
D [kupfer.core.plugins]: Loading kupfer.plugin.nautilusselection
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/nautilusselection.pyc
D [kupfer.core.sources] SourcePickler: Loading Selected File from kkxylkvD8dm57ZdZDHyMvVQ-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.nautilusselection.SelectionSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.rhythmbox
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/rhythmbox.pyc
D [kupfer.core.sources]: Add <class 'kupfer.plugin.rhythmbox.RhythmboxSource'>
D [kupfer.core.sources] SourcePickler: Loading Rhythmbox from kvr4AvwTWwdHwuiCuaa4oIQ-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.rhythmbox.RhythmboxSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.session_gnome
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/session_gnome.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.session_gnome.GnomeItemsSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.session_xfce
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/session_xfce.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.session_xfce.XfceItemsSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.show_text
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/show_text.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.show_text.ShowText>
D [kupfer.core.sources]: Add <kupfer.plugin.show_text.ShowNotification>
D [kupfer.core.sources]: Add <kupfer.plugin.show_text.LargeType>
D [kupfer.core.plugins]: Loading kupfer.plugin.trash
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/trash.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.trash.MoveToTrash>
D [kupfer.core.sources] SourcePickler: Loading Trash from kZ3JcMOa1mAv8rENrBVTMEA-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.trash.TrashSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.triggers
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/triggers.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.triggers.AddTrigger>
D [kupfer.core.sources] SourceDataPickler: Loaded configuration from config-kupfer.plugin.triggers-v1.pickle
D [kupfer.core.sources]: Add <kupfer.plugin.triggers.Triggers>
D [kupfer.core.plugins]: Loading kupfer.plugin.volumes
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/volumes.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.volumes.VolumesSource>
D [kupfer.core.plugins]: Loading kupfer.plugin.websearch
D [kupfer.core.plugins]:   from /usr/share/kupfer/kupfer/plugin/websearch.pyc
D [kupfer.core.sources]: Add <kupfer.plugin.websearch.SearchWithEngine>
D [kupfer.core.sources]: Add <kupfer.plugin.websearch.SearchFor>
D [kupfer.core.sources] SourcePickler: Loading Search Engines from k-mc7AyRia1xjY8-E5K5MBQ-v4.pickle.gz
D [kupfer.core.sources]: Add <kupfer.plugin.websearch.OpenSearchSource>
D [kupfer.core.sources] SourcePickler: Loading Desktop from kXZKJQzcX-FotD7Jk4M6Yzw-v4.pickle.gz
D [kupfer.core.sources] SourcePickler: Loading jochen from kRnBeWrVuodCV+ERT8Kxz3Q-v4.pickle.gz
D [kupfer.plugin.triggers] Triggers: Loaded triggers, count: 0
D [kupfer.core.sources] PeriodicRescanner: Registering new campaign, in 10 s
D [kupfer.plugin.triggers] Triggers: Loaded items
D [kupfer.plugin.applications] AppSource: Loaded items
D [kupfer.obj.objects]: Application not found: epiphany.desktop
D [kupfer.obj.sources] SourcesSource: Loaded items
D [kupfer.plugin.favorites] FavoritesSource: Loaded items
D [kupfer.plugin.clipboard] ClipboardSource: Loaded items
D [kupfer.plugin.firefox] BookmarksSource: Parsing /home/jochen/.mozilla/firefox/5tiatt69.default/bookmarkbackups/bookmarks-2012-11-26.json
D [kupfer.plugin.firefox] BookmarksSource: Loaded items
D [kupfer.core.learn]: Reading from /home/jochen/.config/kupfer/mnemonics.pickle
D [kupfer.scheduler] Scheduler: Loaded
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 9: reading configurations from ~/.fonts.conf is deprecated.
D [kupfer.scheduler] Scheduler: Display
D [kupfer.core.data] DataController: Reloading source root

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'
/usr/share/kupfer/kupfer/ui/browser.py:378: GtkWarning: IA__gtk_style_render_icon: assertion `pixbuf != NULL' failed
  requisition.width, requisition.height = self.__child.size_request ()

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(kupfer.py:1979): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'
/usr/share/kupfer/kupfer/ui/browser.py:2370: GtkWarning: IA__gtk_style_render_icon: assertion `pixbuf != NULL' failed
  gtk.main()

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'
D [kupfer.scheduler] Scheduler: After Display
D [kupfer.ui.browser] WindowController: in lazy_setup
D [kupfer.ui.keybindings]: binding '<Primary>y'
D [kupfer.ui.keybindings]: binding '<Primary><Alt>y'
D [kupfer.ui.browser] WindowController: Trying to register <Primary><Alt>y to spawn kupfer.. success
D [kupfer.ui.session] SessionClient: D-Bus name org.gnome.SessionManager not found
D [kupfer.ui.browser] WindowController: finished lazy_setup
D [kupfer.plugin.trash] TrashSource: Loaded 1 items
D [kupfer.plugin.documents] RecentsSource: Loaded 2 items
D [kupfer.plugin.triggers] Triggers: Loaded 0 items
Error [kupfer.plugin.rhythmbox] RhythmboxSource: Resource rhythmdb.xml in package rhythmbox not found
D [kupfer.plugin.rhythmbox] RhythmboxArtistsSource: Loaded items
D [kupfer.plugin.rhythmbox] RhythmboxSource: Loaded 9 items
D [kupfer.obj.sources] DirectorySource: Loaded 5 items
D [kupfer.plugin.nautilusselection] SelectionSource: Loaded 0 items
D [kupfer.plugin.documents] PlacesSource: Loaded 5 items
D [kupfer.obj.sources] DirectorySource: Loaded 10 items
D [kupfer.plugin.favorites] FavoritesSource: Loaded 2 items

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'

(kupfer.py:1979): Gtk-WARNING **: Failed to render icon

** (kupfer.py:1979): WARNING **: ./src/murrine_style.c:2778: invalid icon size '128'
D [kupfer.plugin.websearch] OpenSearchSource:
Found following searchplugins directories
/usr/share/kupfer/searchplugins
/usr/share/kupfer/searchplugins
/home/jochen/.mozilla/firefox/5tiatt69.default/searchplugins
Error [kupfer.plugin.websearch] OpenSearchSource: [Errno 2] No such file or directory: '/home/jochen/.mozilla/firefox/5tiatt69.default/searchplugins'
D [kupfer.plugin.websearch] OpenSearchSource: Loaded 1 items
D [kupfer.plugin.clipboard] ClipboardSource: Loaded 11 items
D [kupfer.plugin.firefox] BookmarksSource: Parsing /home/jochen/.mozilla/firefox/5tiatt69.default/bookmarkbackups/bookmarks-2012-11-26.json
D [kupfer.plugin.firefox] BookmarksSource: Loaded 0 items
D [kupfer.plugin.applications] AppSource: Loaded 123 items
D [kupfer.plugin.epiphany] EpiphanySource: Epiphany bookmarks file not found: /home/jochen/.gnome2/epiphany/bookmarks.rdf
D [kupfer.plugin.epiphany] EpiphanySource: Loaded 0 items