Hi Dan. I had read several posts from people, even on this forum, that were having trouble with the SD1's OS locking up. I believe they had an earlier version of the OS though. The current version is 4.0b?? or so. Any way, it might be in 'luangrpp's' best interest to update his SD1 to the lastest version so he can get the benefit of all the bug fixes that the newest version offers, including those possible occasional lockups.

Peace

Best regards,
Mike