Can you reproduce this bug in your environment? If not - can you provide mentioned debug build so that someone could provide logs? Did you track down know which call makes engine misbehave? Is version available here for download compiled with debug symbols or is it stripped release build?
I have a traced build that would output the crash log, just need to finish it and put it up here as a debug option. Will try to upload that this weekend. Then, I'd be able to simulate the problem on my end- hopefully.
