I have a Satellite laptop, but I'm sure the new BIOS upgrades have been released for other models. Within the last few days Toshiba released a BIOS upgrade (v1.80). This upgrade tweaked the BIOS for Vista as well as fixing a couple other issues. It claims that after you upgrade to 1.80 you CANNOT return to 1.70.
DO NOT UPGRADE!!!
I upgraded my BIOS to 1.80 and my Edgy install would boot to the Gnome splash and no further. The startup music's first note went on an endless loop. I wasn't too worried at this point, thinking that a fresh install may take care of the problem (wishful thinking, I know). That didn't work either, so at this point, I'm sicker than a dog thinking I just turned my laptop into a brick.
My last attempt to save my laptop was reverting to 1.70. Luckily for me this worked and my laptop is up and running again. I've always heard the warnings that you should not upgrade your BIOS unless you're having issues, but I personally had never had anything go wrong until today. In the future I shall be more careful.
I hope I save some people from what I had to deal with.