I'm having some trouble with my 1Ds dropping the firewire connection while using the fileviewer or zoombrowser. After about 5 minutes the connection drops and cannot be reestablished. I have auto turn-off set to OFF and have the most recent firmware update and zoombrowser update. This has happened before the firmware update as well. I'm wondering if it's an issue with my firewire card and not the camera, although some times I'm unable to turn the camera off (it doesn't go off when I turn the switch to OFF). I've put in a tech support case to Canon, but wanted to check here if anyone else was having this problem.