In FF it does seem to work perfectly! (I didn’t check it before)
But in Chrome it’s still flashing, I also just noticed that it is not offsetting either (the tool tip box is loading with the mouse pointer in the center of the box, making the box appear too low)
I’ll also look into some CSS code to see if there’s something that can be done.
My chrome version is: Version 28.0.1500.72 m (the latest one according to the updater)