Fantastic idea but...
It caused problems with RC3 and Gold for me. In IE it kept maxing out my Computers CPU. Was ok in Firefox. At first I thought it was my computer but had the same problem on laptop. Process IEXPLORE 95-100%. As soon as I would exit the thread it would be fine again. Some other users also reported the problem.
This only happened in threads where the some resizing occured. Most of the other threads were fine. AS a result I've had to uninstall it and everything is fine now.
Thougt i'd let you know