I just installed a clean version of 0.5 from 0.4 and noticed my external drives (USB2) were not mounting at boot. This seemed to be a normal function in 0.4, so before I go hacking away at the system I just wanted to make sure it was intended. They work fine when mounted but then don't re-mount after the system restarts.
My machine is a bit unusual. Atom N2800, laptop power supply, OCZ Agility2 60GB SSD system drive. My external drives are just basic WDs that I had lying around, there are no internal drives in the machine yet, except the system drive.