@ChefChelios:
I do not care about 20k of virtual money. (Most) OpenSource projects depend on users reporting bugs.

@all:
I tried the same dialog pattern again, but was not able to reproduce the bug. If nobody else expierienced problems, the topic can be closed.

I had 35k at Richards, according to "Check my balance".
Withdrew 20k, accidently clicked on "withdraw" again, so I selected "Quit".
Result: 0 GP at Status, 15k at Richards.
Reconnecting didnt help...