Binary package hint: unity
It happens with KDE apps running on Ubuntu 11.04 (Unity 3D). If I start Amarok (or Ktorrent) and closes the app (minimizing it to the tray) and opens it again (using the tray menu), the global menu does't appears anymore. It's necessary to restart the app to fix it. Sometimes, it's necessary to minimize/restore the apps more than one time to reproduce the problem, but it surely occurs.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.10-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,mousepoll,resize,zoom,water,place,screenshot,shift,imgpng,grid,vpswitch,regex,firepaint,move,wall,session,mag,animation,wobbly,expo,unitymtgrabhandles,workarounds,ezoom,animationaddon,staticswitcher,fade,scale,unityshell]
Date: Sun May 1 22:53:53 2011
ProcEnviron:
LANGUAGE=pt_BR:en
PATH=(custom, user)
LANG=pt_BR.UTF-8
SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2011-05-01 (0 days ago)
I can confirm this behaviour with the Clementine application. This happens to me often and I'm also pretty sure that minimizing to tray has something to do with this.