I´m using it with windows 8 and the only problem I had is with the flash files.
Now I´m trying to downgrade to version 10.3, for the rest works like a chain for the moment.
I have a dell I5 8gb ram 1tb 10.000rpm HDD and ATI HD5654 and for the moment the only issue that i found is the problem with the Flash that crashes the application, I didn´t had time yet to downgrade the flash to version 10.3 but the aplication works fine On W7 i get 56fps and on W8 i get 60fps with 4 layers and clips of 800x600.
I´ll keep testing this weekend on a live and monday i can put some more comments
seems to be running nicely. getting 50-60 fps with 5 layers at 1920^1080.
windows 8 pro. all updates. upgraded from win 7 then used refresh windows option to revert it to a fresh install. upgrading over the top of the old install made for a very unstable windows indeed.
so far so good.
alienware m17x r4.
radeon 7970m with catalyst 12.10 drivers
no ssd.