Can you provide some more details on your issue. What device and OS version it is running and any steps needed to reproduce the problem. Following the bug posting guide: http://www.sencha.com/forum/showthre...-the-bug-forum greatly helps getting these issues resolved quickly.
I think this has been fixed, since I'm not able to reproduce this error on the latest build anymore. Could confirm that this has been resolved after we push our new release (0.94) later today? For now I will mark this as fixed.