If it has debris:
If a ship explodes and crashes the game the most common bugs are:
1. Live or normal debris are named wrong
2. There's a ghost sub-object with no geometry in it. (usually called no name or something like that, when clicked on in modelview will show nothing in the display)
3. During conversion a debris piece was lost. (you may have debris01-debris03, but sometimes debris01 may not convert right and so only debris02 and 03 end up in the final pof file)
Fixes:
1. Rename the incorrect pieces
2. Find the debris piece that the light is glued incorrectly to it and fix it
3. unglue the lods and debris then reglue usually fixes that.
If it has no debris:
1. make sure the main lod doesn't have a ghost sub-object.
have a look and see if it's any of those...