Lately I've been having problems with the tablet recognizing that the SD card is installed. I cannot access the SD card with the Gallery app, I get the message "No external storage available". If I go to Settings->Storage I get a quick flash on the screen showing the contents of the SD card then nothing but the stats showing the total (14.81GB) and available space (8.44GB). If I "Unmount SD card" it seems to work. When I "Mount SD card" is displays "Preparing external storage card" and seems to work properly. However, Gallery still does not work. I installed the QuickPic and MoviePlayer apps and they have no problem accessing and displaying files on the SD card. When I try to install a new app I get a message "An SD card is required to download xxxxxxx. Please ensure that the SD card is inserted in your device and that the device is not mounted to a computer." I do the unmount and mount commands again with same results as above. Any ideas other than dumping the tablet?