unity displays skype icon as a single pixel

Binary package hint: unity

Often immediately after logging in, my Skype tray icon is displayed in the unity global menu as a single green pixel (see attached). It appears to be a scaling problem because the pixel does display the skype menu if you place the mouse very carefully over the it and press the right mouse button.

Killing Skype and restarting it usually fixes the problem.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.10-0ubuntu1
Uname: Linux 2.6.39-rc4-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
CheckboxSubmission: 1bd8e90541d49b96c13cbfcc9baf103b
CheckboxSystem: d00f84de8a555815fa1c4660280da308
CompizPlugins: [core,bailer,detection,composite,opengl,imgjpeg,compiztoolbox,maximumize,decor,grid,place,imgpng,session,mousepoll,resize,vpswitch,move,wall,snap,gnomecompat,regex,text,thumbnail,imgsvg,extrawm,animation,workarounds,expo,ezoom,staticswitcher,fade,scale,unityshell]
Date: Thu Apr 21 16:00:22 2011
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100224.1)
ProcEnviron:
 LANGUAGE=en_AU:en
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2011-04-21 (0 days ago)