Problem still remains (started when upgraded 10.04). :(
Sudo killing the process still leaves the system monitor applet with at least
60% cpu usage, though the processes shown in htop (or top) dont stack up to
this percentage... No reboots fix the issue either.
$ ps -eo pcpu,args|sort -rn|head
*** This bug is a duplicate of bug 553328 ***
https://bugs.launchpad.net/bugs/553328
Same here... Never had an issue in previous releases, it stared as soon
as i upgraded to 10.04
$ ps -eo pcpu,args|sort -rn|head
81.2 /usr/bin/python /usr/share/checkbox/backend /tmp/checkboxcHjiFY/input
/tmp