I just upgraded the blog from WordPress 2.0.4 to 2.1. Not a single problem.
I withdraw that statement. My links in the sidebar are all f-ed up. WTF is that mess? Later. I’ll figure it out later.
BUT let me know if you come across any.
I’m also going through and seeing if there are any updates to my plug-ins (which takes for-ever) so there might be a few more hiccups.