Multi-monitor: indicators acting up when second monitor disconnected with indicator opened

TEST CASE:
1. Have a second monitor connected.
2. Open an indicator (menu, time, session, ...) on the second monitor.
3. Disconnect the second monitor.

RESULT:
The indicators on the right side of the panel on the primary screen seem to jump around between the "real" indicators and the ones from the secondary screen (I use a larger secondary monitor, that's why the affected area starts in the middle of the indicator area of my notebook screen - I guess).

Window buttons and menu area don't seem to be affected. Key navigation works fine.

Short clip attached.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
ApportVersion: 1.92-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,move,vpswitch,place,mousepoll,resize,imgpng,regex,gnomecompat,grid,snap,wall,session,animation,expo,workarounds,fade,ezoom,scale,unityshell]
Date: Tue Feb 21 20:15:01 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110112)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)