Windows 7 x64 bit here and working much better.
Title page is a little slow to load, and if the design has numerous images ascotiated with it then these can take a little while too. But... I don't think much to worry about.
** Regarding the Star rating feature. Personally I do not see a need for this. There are already statistics like " likes " and " total downloads " that we can view, to gauge if a product is any good or not. Star rating systems in my opinion are not very accurate anyway, if somebody downloads a model and has trouble printing it, for whatever reason, they may leave a negative rating. Somebody may make a complete mess of printing a perfectly good design and model, but still have trouble printing and leaving negative scores.
Secondly, if I have gone to the effort of uploading models for people to use, for free, I don't particularly wish to see that everyone rates it so badly!
Just another two cents