Taken from the QQQA thread:

I have a head scratching problem that i ran into last time i was in the ck and just quit b/c of it.

I have an interior cell that when i run havok sim on it, it crashes the CK. Also if i try to set an NPC to "Starts Dead" it crashes it as well.

it's basically a shack, that i copied from a vanilla shack, copied into my cell and added a ton of empty bottles, as its supposed to be a drug addicts shack.

I only have this problem in this cell, maybe there's too much stuff in there? I don't think there is, maybe 500-600 pieces of clutter max.