12-03-2013 10:29 PM
You should be able to just delete the thumbnails folder. This will force the OS to recreate that folder and all of its content. If there is a corrupted file in there than that could be what is causing your problems. I have seen this issue before.
The reason you can't take pictures with the phone Connected to a computer is that the phone needs the SD card to save the images to. When connected to the computer the SD card is not accessible to the phone, except in PC mode. I don't know if it would work in that mode either. HTH
Well, I do not think it is related SD card cuz I have changed the image saving path to phone, instead of the SD card.