My iTunes is hosed?

Sunday, August 5, 2007 by Dave Winer.

I'm beginning to think that my copy of iTunes is hosed. 

I can't copy AVI files into the list, even ones that I was able to copy before. When I do, it just rejects the file, no error dialog explaining why, it just refuses to copy the video. 

When I plug in my iPhone it says there's an update available, but when I say yes, go download and install it, it claims it can't find the update server over the Internet (yet it was able to tell that an update was available, and the Internet is working fine otherwise). 

I click on the Radio icon, and it can't find the list of radio stations. 

So the question is: how to install a fresh copy? 

Advice is welcome.