I got iceweasel opened, and want to save a site.
I go to the menu -> File -> Save as
A popup windows open, where i can navigate to the directory where i want to save.
At the top it starts with Z, and at the bottom is A. like in Z...A.
Here is a screenshot, got give the idea:

http://img.secretpicdump.com/original_1 ... omztoa.jpg
It is for all windows of that kind (pop-ups, where i can navigate to open/save/whatever files.
It is only on this installation (Debian-Sid), on all others (Debian or refracta) it is A...Z.
How can i change that?