Clicking on the launcher item for a mounted drive opens nautilus twice

Binary package hint: unity

Nothing more to say, it happens every time, with every drive/partition i tried it.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.2-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,imgjpeg,decor,snap,place,imgpng,text,gnomecompat,vpswitch,staticswitcher,regex,resize,move,session,imgsvg,mousepoll,grid,wall,animation,fade,workarounds,expo,scale,scaleaddon,unityshell]
Date: Thu Apr 7 15:11:38 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110320)
ProcEnviron:
 LANGUAGE=de_AT:de:en
 LANG=de_AT.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)