Yup, new build is out and you can grab latest version from ftp server.
The number and severity of the security vulnerabilities that are being patched were not known early Tuesday. Bugs fixed so far for Firefox 22.214.171.124:
=> 83 in total
=> 42 crashers
=> 3 memory leaks
=> 41 regressions
=> 4 privacy-related bugs
=> Download Firefox 2.0.1 Linux version
=> Other platforms (Mac/Windows)
According to Mozilla developers, the Windows updates have been tested and work as expected in Vista.
PS: I’m not sure why version number is 126.96.36.199 instead of 2.1/2.0.1
Updated for accuracy.