If uploading sketches using the IDE fails, follow these steps to update the bootloader:
-Prepare an Un0, Mega or similar to act as ISP as described at http://.cc/en/Tutorial/ISP -Wire it up as shown in flasbootloader_connected.png (Picture Reveiw of SKU099688) -Use IDE to flash the bootloader of the corresponding Pro/Pro Mini (5V, 16MHz) to SKU099688 or SKU066315