Other than my initial stupidity when using the new uploader i am very surprised that I have no complaints. It IS somewhat slower but I can live with that, just to be done with all the Java nonsense.
There is one thing...I thought I read here somewhere (can't find it now) that after uploading pics WHILE doing a listing that they should automatically appear in the listing. (Like they used to) As others have said, they don't. Mine don't either and I have to go back and choose them. It's no big thing to me, I never upload alot of pics at one time but I could see where it would be annoying for those who upload a LOT at once.
I am using Vista with Firefox. For me at least, so far so good.