unity-panel-service consuming very high cpu time

Binary package hint: unity

Running 'top' I get something like:

Tasks: 158 total, 4 running, 154 sleeping, 0 stopped, 0 zombie
Cpu(s): 87.7%us, 10.3%sy, 0.7%ni, 1.1%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 1016912k total, 872920k used, 143992k free, 74068k buffers
Swap: 2103484k total, 32248k used, 2071236k free, 424880k cached

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 1584 marco 20 0 103m 20m 9556 R 91 2.0 26:29.98 unity-panel-ser

unity-panel-service is almost always at 90% of CPU time or higher.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-1.28-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,scale,session,unityshell]
Date: Mon Feb 7 09:32:56 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110101)
ProcEnviron:
 LANGUAGE=en
 LANG=pt_BR.UTF-8
 LC_MESSAGES=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: unity