I was creating a couple of weeks ago a simple straightforward workflow via Sharepoint Designer. No big deal, at a certain point the WF needed to wait for a couple hours.
Did the test but the workflow didn’t wakeup after the specified amount of time even not a day later.
It was a critical issue for the project so we logged a call at Microsoft. After a lot of emailing and versioning checking, the MS guy told me that this is indeed a bug and will be solved in the next version. The patches & fixes & service packs didn’t solved the problem 😦