Comment 7 for bug 777611

The last few days i also getting this when i try to copy-cut/paste or drag and drop a file/folder!

XsessionErrors:
 (xfce4-indicator-plugin:2296): libindicator-WARNING **: IndicatorObject class does not have an accessible description.
 (xfce4-indicator-plugin:2296): libindicator-WARNING **: IndicatorObject class does not have an accessible description.
 (polkit-gnome-authentication-agent-1:2395): GLib-CRITICAL **: g_variant_new_string: assertion `string != NULL' failed
 (polkit-gnome-authentication-agent-1:2395): polkit-gnome-1-WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
 (xfce4-indicator-plugin:2296): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed
 (xfce4-indicator-plugin:2296): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed
 (xfce4-indicator-plugin:2296): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed
 (gnome-settings-daemon:2339): clipboard-plugin-WARNING **: Clipboard manager is already running.
 (gnome-settings-daemon:2339): color-plugin-WARNING **: failed to get edid: unable to get EDID for output
 (gnome-settings-daemon:2339): color-plugin-WARNING **: unable to get EDID for xrandr-default: unable to get EDID for output
 (gnome-settings-daemon:2339): color-plugin-WARNING **: failed to reset xrandr-default gamma tables: gamma size is zero
 (gnome-settings-daemon:2339): power-plugin-WARNING **: IsInhibited failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
 (gnome-settings-daemon:2339): power-plugin-WARNING **: failed to turn the panel on: Could not change DPMS mode
 (nautilus:2330): GLib-GIO-CRITICAL **: g_file_query_info: assertion `G_IS_FILE (file)' failed
 (nautilus:2330): GLib-GIO-CRITICAL **: g_file_get_basename: assertion `G_IS_FILE (file)' failed