Tor Browser Bundle 3.0alpha1 bug

Hi there, I have tried the new bundle and as soon as it starts it shows just a blank window. I have tried several things (even to right click on 'Start Tor Browser' and select "Properties->Compatibility->Run in Windows XP Compatibility mode) but the only way to make it work has been to copy the firefox folder from tor-browser-2.4.12-alpha-2 and paste it into the Tor Browser Bundle 3.0alpha1 folder, I was then able to move it in to "documents" folder and run it in Windows 7 Compatibility mode

MS windows 7 home premium 64-bit SP1 intel core i5-2320 3.00 GHz nvidia geforce GT 530

Trac:
Username: torrible