As an update to the issue I reported the other day, Microsoft has now fixed the problem on their server. They saw the buzz from Firefox supporters and corrected it in under 2 days. I’d like to personally thank Microsoft for the quick resolution. No word on that cryptic error message though.
The gradient on the top of some Microsoft.com pages is still broken (while in other places they replace it with an image). But that doesn’t hamper use of the site. Just appearance.
So thanks to everyone at Microsoft who resolved it, and those around the blogosphere for getting their attention.