Bug 162644

Version:           1.9.9 (using 3.5.9 "release 62.2" , openSUSE )
Compiler:          Target: i586-suse-linux
OS:                Linux (i686) release 2.6.22.17-0.1-default

My goal is to find the folders using the
most disk space. Therefore I'd like to
calculate the size of all folders at once
(and, open the complete folder tree).
Then I could sort the folders by size.

Right now, the size of a folder is calculated
by clicking on it. And, it is reset to "-"
for some reason (don't know due to which event,
maybe mail check?). So, it is not possible for
me to click on all folders before some are reset
to an unknown size.