I'm running Cyanogen Mod 6.1.2 stable. I haven't had this problem until lately. I noticed this happening first with Facebook. I'll be using the Facebook app and then went it refreshes data on the app, it'll close completely and then I have to open it again. Also, I have noticed it happening with ChompSMS as well. I'll access it, and then while I'm typing a message, it'll close. What could be wrong? I even have Auto Memory Killer, and it never did this before until lately.