Great, so we can now see here in this transaction:
https://blockchain.info/tx/61303c25d01784857e6e2de95817e735cfc9c0f693e1506fb0e13bd418b1b524that MtGox sent 0.5762188 BTC.
Oh, wait, I just remembered reading about someone else having this issue recently. I'm almost certain this
IS a bug in the version of MultiBit that you are running. I'm not sure, but there may be a patch available. I'll look and see if I can find the discussion, and if so I'll post a link here.
The issue was that a recent version of MultiBit wasn't properly handling situations where the comma and the decimal point aren't used they way they are in the United States. I suspect that in German, a comma is used instead of a decimal point, right? Hopefully, I'll be back shortly with a link for you.