The Metafiltr project page has HTML in the title.
Uppercase HTML TITLE text in anchor tags gets converted to lowercase (I think via previewing a post). Seen here on AskMe. Also seems to be buggy on MeFi. [MI]
The title attribute should probably not be used as footnotes or for excerpts. Discuss.
I have recently noticed that when I put my cursor on some links, like the one here, after a second or two I get a balloon briefly describing the link. Since I am an HTML novice I figure this is an added tag that I do not know. Can someone fill me in?