Just bought a 16GB micro SD card for my A500 and the A500 is now refusing to mount *any* external SD cards. I had a 2GB card lying around and successfully installed and used it in the A500. When the 16GB card arrived, I copied the contents of the 2GB card to the new card, confirmed the 16GB card was FAT32 formatted and tested the new card on my PC. But after plugging it into the A500 and powering the A500 down several times, the Settings | Storage screen still shows "External SD card" as unavailable. And /mnt/external_sd is empty when checked with ES File Explorer. I have since gone back with the 2GB SD card and *it* won't mount. So it seems like something is borked with the A500. I'm running Acer's current official 3.1 firmware. Does anyone know how to get external cards to mount? Thanks.