On my modified version of 0.21, I'm getting crashes-to-desktop whenever a smoking tile bursts into flames. It looks like an SDK issue, but it's never happened with a clean FFH. Regular flames (like those created when Acheron shows up) seem to work fine; it seems the transition from smoke-to-flames is what causes the crash. Could someone explain how the fire system works and what could be the cause of this problem?
I know this is a bit obsolete now that 0.22 is out, but I didn't see it in the changelog so if this bug hasn't been identified before, the problem might be in 0.22 as well. However, I thought this was the appropriate place to put it since I encountered the bug in 0.21.