CANON 60D FIRMWARE UPDATES FAIL with EYE-FI PRO X2 SDHC WIFI MEMORY CARD
You will not get a successful firmware update if you attempt to use a EYE-FI PRO X2 SDHC WIFI MEMORY CARD. Use a standard card such as a SANDISK EXTREME III CLASS 10 SDHC. I tested this out several times with the latest firmware update.