User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113 This probably is yet another silly javascript check. The 'online' streaming section of http://sirius.com/ supports IE and Netscape4 but not Mozilla. It directs you to a page on Netscape.com to 'upgrade' mozilla. Reproducible: Always Steps to Reproduce: 1.Go to http://sirius.com 2.Click on the 'listen' tab on the top of the frontpage 3. Actual Results: A "browser not supported" pop-up appears Expected Results: Allow you to log into the site.

*** This bug has been marked as a duplicate of 155985 ***

This isn't a dupe of 155985, which AFAICT is about the site sending broken code, not the "unsupported browser" message. This should probably be duped to bug 287280, which explains the "unsupported browser" TE issue much more clearly.