This is very much an edge case, but I thought it might be interesting to know. I went into the Home tool on a site, and edited the options for the Worksite Info frame. I changed the title of the frame from "Worksite Info" to "<marquee behavior="alternate">Worksite Info</marquee>". When I saved this change, the title of the frame was actually scrolling, but the Options button was broken-
I clicked on it, but it no longer worked. The Options button also got replaced with some exposed code. However, the tag worked-the title of the frame behaved in the way that I wanted it to.