First off, it's sweet
This actually looks like it might cause me to switch my Desktop OS from Gentoo to Mint, I mean I'm really liking it
Anyway couple things I've found ...
1. System > Authorizations - pukes when I click on it, just sits there and thinks for a bit then nothing. No error, just nothing
2. System > Users and Groups - the "unlock" button is grayed out, can't manage any system permissions through the GUI
Other than that it's a really, really sweet distro and keeps getting better with every release, I've even put Mint 6 on my Laptop to take it for a spin