turn on paint flashing, mouse over a gfx scrollbar (like in bookmarks window) and you'll see the whole tree reflow/repaint. this is happening because the :hover rule for each component of the titledbutton sets the list-style-image property in CSS. While the titledbutton code can tell that the new image is the same size as the old one and only a paint is needed, the style system assumes a reflow is needed.
after talking to evaughan and peterl, we need to suck up and deal and do the work to not use the list-stlye-image tag but use a pseudo-element and the content property. changing the summary, moving out to M15, assigning to evaughan
Mass moving M17 bugs to M18
titledbutton are deprecated and should never be used. This bug is now invalid.
allrighty then. Marking VERIFIED