FCM in OAT3.12, any known problems?

Topic says it all.

More specifically, I wonder if anyone is aware of any problems with FCM in OpenAT 3.12 that can cause the FCM to randomly close a flow or randomly switch from DATA to AT by itself.

Also, I wonder if anyone else have had any problems with module crashing after performing a large number of AT->DATA and DATA->AT switches. Large number being >2000.