I just bought a Nex-3N, and when I try to use to 10 sec self-timer, a lot of times it does not work. When I change it to the 2 sec timer it works. I suspect this maybe a firmware issue as the buttons seem to work for other options. Sometimes turning it off and on, seems to reset it so it works again. Has anyone else experienced this? Any way to fix this? I hate to return the camera as it works well otherwise.