Rated 4 out of 5 stars
Very nice idea. Small problem though: if one highlights text with a non-standard font, say Comic Sans, then clearing the highlight sometimes (but not always) changes the font to variable width.
Looking forward to the next version.
Great, this bug is really old, and it's one of the very annoying thing that was difficult to fix due to the poor quality of the developer documentation available...
By googling around, however, I have been able to fix it, and it's now on github (4/07/2011). I submit my addon for review now, the official package should be available for update (hopefully) soon.