No audio/visual feedback when dropping items on trash in launcher

Binary package hint: unity

Steps to reproduce:
Take item item from the files place. Drop it onto the trash (or "waste basket") in the launcher.

Expected behavior:
A sound or a visual response that reassures that the item has been moved.

Actual behavior:
Nothing happens

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.6.8-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-7.38-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
NonfreeKernelModules: wl
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,gnomecompat,mousepoll,grid,vpswitch,place,compiztoolbox,move,resize,snap,regex,wall,session,animation,workarounds,expo,ezoom,staticswitcher,fade,scale,unityshell]
Date: Fri Mar 25 18:56:04 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110122)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2011-03-25 (0 days ago)