I have the same problem with 2013-12-20-wheezy-raspbian.img: Mounting local filesystems...[...] mmc0:Timeout waiting for hardware interrupt - cmd12.. [...] mmcblk0: error -110 sending stop command, original cmd response 0x900, card status 0xf00 But with 2013-09-25-wheezy-raspbian.img my system works...