I haven't had any issues with it on Amazon, nor Yahoo!
Except for the fact that Yahoo!'s Launchcast music player thing doesn't support Firefox.
Which really sucks, because since AT&T Yahoo! is my DSL provider, I get Launchcast Plus for free.
(The first sentence answers your question, the last two are just me rambling, so you can ignore those.)
(Yes, I realize that was two sentences too late.)