I updated my MacBookPro to Mountain Lion from Snow Leopard a while ago and hadn't tested going into Bootcamp for quite some time. I recently did and found the much talked about 'black screen of death' appearing after the normal 'Starting Windows...' graphic.
After much searching I could only find people talking about this happening immediately after installing bootcamp or in the middle of installing bootcamp and Windows7 but not when you have had a working installation of Windows7 via Bootcamp which now is broken due to Snow Leopard.
I can still get into Win7 via Safe Mode and did run the ATI Catalyst to update my AMD Radeon drivers but to no avail. It still does not work...
Thanks - J