Over on the MK Raspberry Jam Forum, there’s been a report that there are subtle millimetre-sized differences between the basic layout of the Model B and Model A. Apparently the USB port on the Model A sticks out about 1mm more than the Model B’s two ports. Has anyone got the patience with a ruler to confirm this, and perhaps make sure that there aren’t any more differences?
Apparently the difference is that the USB port extends 8mm on the A and 7mm on the B. This does not seem to have any effect on cases for the Pi (as no case thus far encloses the port completely). Of course, if someone has a case that does not fit, please comment below!