Pidgin makes the whole interface severely bug

[Espinet François]

Binary package hint: pidgin

When starting Pidgin with the unity interface, the background sometimes gets black and graphical performance is reduced:the screen doesn't really refresh and the whole system is slow. Also clicks are practically useless.
The situation gets back to normal when pidgin is stopped

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: pidgin 1:2.7.9-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic i686
Architecture: i386
Date: Sun Jan 9 12:22:12 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101202)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 LC_MESSAGES=en_US.utf8
 SHELL=/bin/bash
SourcePackage: pidgin