This script will add mouseover post preview popups to Lithium-based community systems. Also on "Recent posts" pages, answers in the Q&A sections have the link updated to show the whole thread.

As of 2012 it was working on Lithosphere, Verizon, Barnes & Noble, Adult Swim and Second Life forums. It was not usable on Comcast forums, as they did not allow XML message reading. Others have not been tested so far.