There is a bug, which I'm quite unable to isolate, that causes imaps with wormholes to crash it. There is a catch - it doesn't always happen. I was going along with the imap that I was modifying, and it was working just fine... I uploaded it to vadi, deleted my imap (I had one that was crashing me, 503.), restarted (with no imap), downloaded 504 (my previous non-bugged one) and as soon as I did: BAM, the 'new' version crashed it... I downloaded 432, then updated to 504 direct from 432, and no issue. Same from 502 to 504. From nothing at all to 504 though, it crashes. I've not a SINGLE clue where to start looking.
So I found the bug... wasn't what I claimed at all. Not the iMap crashing it. It's crashed by the config file... In specific, if you disable any areas, it crashes it next time you load. I'll re-upload the imap now.
Was there any crashlog? That might help to narrow the error.