Stuck on Starting XBMC

[liamg]

Good morning. I've a similar issue.
I’ve received a new Rasp B 512 and, when trying to make a fresh install of Beta2, my Rasp freezes. The weird thing is it works fine in my old Rasp 256 (the same sd card –Trascend-, the same image…) I’ve tried with Beta1.1 and some backup images too an it’s almost the same. With a different sd card (Patriot) XBian boots but freezes on reboot (in the 512 model, in the 256 it works). I’ve spent most of the night burning/booting/rebooting and have no clue what can happen (I tried Openelec just to make sure the Rasp 512 is fine and it works out of the box with any of the sd cards: one Patriot 8Gb class 10, two Trascend 8Gb class 10)
Any help would be greatly appreciated :-)
Thanks in advance