compiz assert failure: *** glibc detected *** compiz: free(): invalid pointer: 0x00e68ff4 ***

[Szymon]

After I clicked "close the process" on Pidgin in System Monitor, monitor screen blinked and Compiz crash has been reported.
By the way I can't open pidgin main window with contacts clickin on Pidgin icon in unity panel - login on second user there is no problem with Pidgin.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.18.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu2
Architecture: i386
AssertionMessage: *** glibc detected *** compiz: free(): invalid pointer: 0x00e68ff4 ***
CrashCounter: 1
Date: Thu Sep 29 21:27:33 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100318)
ProcCmdline: compiz
Signal: 6
SourcePackage: unity
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /lib/i386-linux-gnu/libc.so.6
Title: compiz assert failure: *** glibc detected *** compiz: free(): invalid pointer: 0x00e68ff4 ***
UpgradeStatus: Upgraded to oneiric on 2011-09-27 (2 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev nopasswdlogin plugdev sambashare tape video
XsessionErrors:
 (nautilus:1532): Gtk-CRITICAL **: gtk_action_set_visible: assertion `GTK_IS_ACTION (action)' failed
 (nautilus:1532): Gtk-CRITICAL **: gtk_action_set_visible: assertion `GTK_IS_ACTION (action)' failed

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #750386, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.