Application crashes at AudioToolbox thread on a stressed iPod Touch, fw 3.1.3

Question

Hello all,

I encountered an AudioToolbox crash in my application. Here's the crash log, http://paste.uni.cc/20775

And I'm using AudioToolbox + OpenAL to play music (m4a) and sound (wav). It happens only on stressed device. So I can't tell what's wrong with it. The crash log didn't report not enough memory, but instead of that, it reports crash on AudioToolbox thread.

Did you encounter this crash before? Any information will be appreciated.

Thank you.