Comment 3 for bug 498980

the fix is to remove/purge pm-utils and reinstall it. specificaly, i did this and it helped:

$ sudo aptitude purge pm-utils

it will complain that it needs to remove acpi-support. i accept it.

then i also removed remaining scripts in pm-utils directory:

$ sudo rm -rf /usr/lib/pm-utils/*

and then reinstall acpi-support which will install also pm-utils:

$ sudo aptitude install acpi-support

now it works like charm.
i have no idea what was the problem. didn't backed up the scripts dir or something, so i don't know the diff. if somebody with the same will try the above, backup first /usr/lib/pm-utils/* and when reinstalled make a diff. then post the diff here...