i will check for the db connection (i remember now, it was reason for a whitescreen at installation) but since i didnt change anything, and my gf, who uses the blog does not have priviliges to neither change the wp-config nor the db password (and i really dont think, an attacker would hack my server, just to provoce a wordpress whitescreen) im not sure if its reason for the problem.
i dont think that i know what im doing, like a systemadministrator does, but im not doing that bad xP
and please excuse my english its propably not that good.
edit: and excuse this whole thread: im really an idiot, looks like someone (me?!) shut down the mysql server, i will see if i can rename myself to "troll" SORRY!
for the ones, who are experiencing the same issue:
looks like a white screen comes from:
- broken db connection