Paste gives strange character instead clipboard on Unity Dash Search Box

Binary package hint: unity

When I try to paste any text into Unity Dash Search Box, I just can see a strange character instead clipboard content, like you can see in attached image.

The system language is Brazilian Portuguese.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.8-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
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 18:58:55 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
ProcEnviron:
 LANGUAGE=pt_BR:en
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)