Made a withdrawal this morning (UK time) and it seemed to work fine - at Bitstamp it's marked as "Finished" - but it never appeared in the wallet. I sent them a support ticket after a couple of hours, but no reply yet.
It's a 1 BTC transfer so I'm not sweating too much (just happy it wasn't 10 BTC, I made one of those last week).
It's probably going to be all right, but I wish they'd post a statement or something. Also, for a few hours I suspected I'd misspelled the wallet address somehow, and there is no way to verify on Bitstamp which address I used.