Firefox 2.0.0.1 is going to be released soon (December 14th?). If you are curious as to what kind of fixes are in this build check out the Firefox 2.0.0.1 fixlist. There are currently about 180+ fixes (landings):
- General Landings — 99
- DOM Landings — 11
- Layout Landings — 16
- RSS Landings — 6
- JavaScript Engine Landings — 50