User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7) Gecko/20040808 Firefox/0.9.3 Build Identifier: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7) Gecko/20040808 Firefox/0.9.3 A CDATA section in a style element is ignored. This works in XML mode. Reproducible: Always Steps to Reproduce: 1. Create a foo.html file 2. Fill in an empty HTML page 3. Put <style><![CDATA[html { background-color: yellow }]]></style> in <head/> 4. load, and make sure it's rendered/seen as HTML Actual Results: Won't show a page with a yellow background. Probably default bgcolor. Expected Results: A page with a yellow background. From discussion in #mozilla, I believe this is not specific to style elements, but I didn't test it.

Dupe of bug 27403 ?

absolutely. sorry for the duplicate. *** This bug has been marked as a duplicate of 27403 ***