Hmm, interesting. The official site still shows 1.5.0.4 to be the latest release...so I'll just wait until it's released officially to download it. However, thanks for the tip.
FileHippo's change log is as such:
Improvements to product stability
Added changes for Frisian locale (fy-NL)
Several security fixes
Now that I've gone there...I'm tempted to download Firefox 2 Beta 1. Anybody have opinions on it?