dead keys don't work in unity search fields

Binary package hint: unity

1) click on the "files and folders" on left panel
2) type in the search field "pôle" => it shows "p^ole"
So one is unable to search for files and folders containing î ô ï and so on

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unityshell]
Date: Sat Apr 16 07:54:33 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110413)
ProcEnviron:
 LANGUAGE=fr_FR:en
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)