image Mozilla has released the second Release Candidate for Firefox 3, if you had RC1 installed it would have come as an automatic update, otherwise you can get it from the download page.  The release notes for RC2 are here

There aren’t any new features, this is a pure bugfix release. Ironically though, there are more ‘known issues’ in RC2 than there were in RC1 (21 vs 17). 

The final for Firefox 3 is due later this month I believe.