A few questions would help us to troubleshoot this issue:
-What brand and size of SD memory card did you use?
-How many times has the camera locked-up?
-What was the state of the AA batteries when the lock-up occurred? Full - middle – low?
-Did the camera locked-up during or after the video was recorded?
-Any details you can provide right before the lock-up occurred will be helpful.
In general, just like a computer, any camera or electronic device can lock-up for a variety of reasons. We are not aware of any bugs that would cause the camera to lock-up as we have been manufacturing the camera for over one year without any technical or bug issues. In most cases, when a lock-up occurs, we find the memory card or some kind of physical damage to the electronics to be the source of the problem.
It may also help to expedite this troubleshooting effort if you call our service center (assuming you are in USA) at (856) 866-9191 ext 136.