Unity unusable when trying to move tab between 2 gedit windows

[Id2ndR]

STR (100% reproductible):
- open a text file with Nautilus
- open an other text file using File lens of Unity
=> You get 2 windows of gedit instead of a new tab in the first window
- try to move the tab between the 2 windows
=> gedit consumes 100% of one CPU ; There is a "hand" pointer instead of an arrow ; gedit windows become gray because they aren't responding to the window manager
- kill gedit process
=> You can now use your X session again because the pointer is release.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gedit 3.2.3-0ubuntu0.1
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Wed Jan 4 17:06:20 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: gedit
UpgradeStatus: No upgrade log present (probably fresh install)