Search hint is hidden while iBus is enabled

Unity hides the search hint when iBus is enabled.

Step to reproduce:
1. Open Dash (you can see the search hint)
2. Press Ctrl+Space to enable iBus

Actual Result:
    The search hint is hidden

Expected Result:
    It will be hidden when the pre-edit text is shown.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.8.0-0ubuntu2
Uname: Linux 3.3.0-030300-generic x86_64
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
Date: Fri Apr 6 18:34:52 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-03-24 (12 days ago)