Freeze when I close an IRC window

Often (but not always), when I close an IRC window or tab, the window turns gray and the whole application freezes, so I have to kill it.
It happens only since I have upgraded to Precise.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pidgin 1:2.10.3-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic i686
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
Date: Mon May 14 13:26:32 2012
ProcEnviron:
 LANGUAGE=fr_FR:en
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: pidgin
UpgradeStatus: Upgraded to precise on 2012-04-27 (17 days ago)