do you have anything mapped to the focus button via camkeyd/shortcutd (am unsure than the latter can do focus butt.)? - no In the camera app, general settings, is "Show on focus button press" enabled? Having it set does not cause issues for me but you never know on another device - no, disabled. I turn on it & it works! Great Thanks! I will test blessN900 for few days & at will write the result here