When doing a term search on superuser.com and it switches the term to a tag. If the tag is a tag you are following, you can't read the tag text unless you hover over the tag. The tag get places under the heading "within these tags" at the top right of the page. The text color and the background are the same color making it impossible to read the tag text unless you hover over the tag block.
Browser is Google Chrome on XP (not sure if it matters as I haven't tested it out with other browsers)