launcher does not show open docs

[Frans Papma]

Fresh install of Ubuntu 12.04.1 LTS. After some time the Launcher does not show with arrows at the sides of the icons that docs are open for certain programs (certainly Libre Office programs), and once you switch to another application or doc, you cannot click on the launcher to get back to the open document. Instead a new document (in case of Write) is opened. Also Alt-tab does not show (all) programs with open files. The only way to get back to open files is through Dash. I repair this (temporarily) by command line command: unity -- reset. After that the Launcher works normal, until the next time it fails. This is the output of the Terminal after typing the command (please note that the program advices to report a bug):

frans@frans-AO722:~$ unity --reset
WARNING: Unity currently default profile, so switching to metacity while resetting the values
Checking if settings need to be migrated ...no
Checking if internal files need to be migrated ...no
Backend : gconf
Integration : true
Profile : unity
Adding plugins
Initializing core options...done
compiz (core) - Warn: failed to receive ConfigureNotify event on 0x1800004

compiz (core) - Warn: failed to receive ConfigureNotify event on 0x3200003

compiz (core) - Warn: failed to receive ConfigureNotify event on 0x38000ba

compiz (core) - Warn: failed to receive ConfigureNotify event on 0x3c00064

Initializing composite options...done
Initializing opengl options...done
Initializing decor options...done
Initializing vpswitch options...done
Initializing snap options...done
Initializing mousepoll options...done
Initializing resize options...done
Initializing place options...done
Initializing move options...done
Initializing wall options...done
Initializing grid options...done
Initializing session options...done
Initializing gnomecompat options...done
Initializing animation options...done
Initializing fade options...done
Initializing unitymtgrabhandles options...done
Initializing workarounds options...done
Initializing scale options...done
compiz (expo) - Warn: failed to bind image to texture
Initializing expo options...done
Initializing ezoom options...done

(compiz:3627): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed
Initializing unityshell options...done
compiz (core) - Warn: unhandled ConfigureNotify on 0x1a000a0!
compiz (core) - Warn: this should never happen. you should probably file a bug about this.
compiz (core) - Warn: unhandled ConfigureNotify on 0x1a000a3!
compiz (core) - Warn: this should never happen. you should probably file a bug about this.
compiz (core) - Warn: unhandled ConfigureNotify on 0x1a000a6!
compiz (core) - Warn: this should never happen. you should probably file a bug about this.
compiz (core) - Warn: unhandled ConfigureNotify on 0x1a000a6!
compiz (core) - Warn: this should never happen. you should probably file a bug about this.
compiz (core) - Warn: unhandled ConfigureNotify on 0x1a000a9!
compiz (core) - Warn: this should never happen. you should probably file a bug about this.
compiz (core) - Warn: unhandled ConfigureNotify on 0x1a000a9!
compiz (core) - Warn: this should never happen. you should probably file a bug about this.
WARN 2013-01-07 12:01:01 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-writer.desktop' is using a deprecated format for its actions that will be dropped soon.
WARN 2013-01-07 12:01:01 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-calc.desktop' is using a deprecated format for its actions that will be dropped soon.
WARN 2013-01-07 12:01:01 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-impress.desktop' is using a deprecated format for its actions that will be dropped soon.
Initializing staticswitcher options...done
ERROR 2013-01-07 12:01:05 unity.glib-gobject <unknown>:0 g_object_unref: assertion `G_IS_OBJECT (object)' failed
Setting Update "main_menu_key"
Setting Update "run_key"

The terminal does not return to the command prompt and seems to be stuck; but meanwhile the screen is built up anew, and the launcher works for some time

 My computer is ACER AO722

Trying to find package name (as suggested by this site):
frans@frans-AO722:~$ apt-cache policy pkgname
N: Unable to locate package pkgname
frans@frans-AO722:~$
But I know that this is Ubuntu 12.04.1 LTS.
It happened also in 12.10, which I abandoned for having many other problems.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1096859/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]