I found a bug after using this great program for a day.
It seems that this extension screws up my tooltips and titles. Whenever I hover over an image, the title (tooltip) appears not under my cursor but really high up. Here is an image for example (note the missing cursor which is supposed to be over the Quick Reply button):
http://www.retrogravity.com/alex/untitled.GIF
Another thing it does regarding tooltips, is in the browser itself, the tooltips sometimes will flash and then dissappear making it impossible to read them.
I've narrowed it down to this extension after disabling it and noticing the problems being gone.
If you can fix this, thanks! This program is already awesome and with these minor bugs fixed, would be perfect!