calibre's unity launcher and Alt+Tab window switching don't work

[Mario Vukelic]

1. Calibre icon not locked to Unity launcher
2. Launch calibre from dash

-> Calibre launches, but note that the running status is not indicated by the white triangle in the launcher

3. Switch to a different window
4. Click calibre's Unity launcher to return to calibre

-> This does not work: The launcher pulses as if a new instance of calibre was launched, but in fact it isn't. Unity does not switch to the existing calibre instance.

5. Hit Alt+Tab

-> The calibre window is not listed in the Alt+Tab overlay

6. Hit Super+W

-> This works and is currently the only way to switch to calibre, for me.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: calibre 0.8.38+dfsg-1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.0.1-0ubuntu5
Architecture: amd64
Date: Wed Apr 25 23:48:55 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64+mac (20110422)
PackageArchitecture: all
SourcePackage: calibre
UpgradeStatus: Upgraded to precise on 2012-04-02 (23 days ago)

[Mario Vukelic (kreuzsakra)]

Tried it again today and suddenly it works. I don't understand, but I'm closing the bug for now