GameTooltip leaving screen
 

When I start the game at first everything is fine regarding the GameTooltip.
It is showing perfectly and always sticks within the screen, so it never leaves it
so that parts of the tooltip are cut and not readable.

But as I play along, some actions seem to happen which make the GameTooltip
leave the screen. For example:



I know that there once was a bug at blizzard code which caused that. Is that still the case?
I also know that addons can cause such things.
Any ideas what could lead to a GameTooltip leaving the screen?

Tested on Beta for hours now. I is not happening there.
So I guess it was a Blizz Bug indeed which got fixed.

The same addon(s) were tested on Beta, or you tested Blizzard tooltip functionality ?

Did the tooltip problem happen for you on Retail without any addons present ? I've not noticed this myself but then I don't have any tooltip related addons.

Im developing interface addons myself. With my addons active only I got the tooltip issue on retail.
Without any addon active at all I did not get the tooltip issue on retail.

however with only my addons being active on beta I also did not get the tooltip issue.