I also get a crash with AmBusam's save. As with other CTDs I've posted about in the past, this crash can be resolved by deleting flame effects in WB (so apparently the flame effect fix that was put into .33 didn't work--which makes sense as I don't believe this is a graphical bug).
This save is particularly interesting because there are only two flame tiles on the map, so it's easy to narrow down which is the source of the crash. Specifically, I find that deleting the flames on the desert tile next to Acheron prevents the crash, but deleting the flames to the NW does NOT prevent the crash.
I hope this is helpful in narrowing down the source of the crash. I get this crash at some point in most of the FfH games I play--it's always resolvable by deleting flames, but it's still irritating.
Also, I have a crazy theory that this issue may be the source or be related to some of the OOS complaints, especially the Vista-XP OOS issues. If you're looking for things that run differently in Vista and in XP, this Vista-only flames crash is certainly a candidate. Also, some of the ways that OOS issues are described to appear (resolved easily by reloading at first, but increasing in frequency until the game becomes unplayable) parallel the appearance of this bug.