Comment 18 for bug 114363

I checked my xorg.conf and I do only have the former of these two lines
in there. As I am not using the Emulated3Buttons function on quitting
from a Flash movie, I doubt this might solve anything for me. I also
don't want to turn it off, as I neeeed it. I might give it a try later
though.
Option "Emulate3Buttons" "true"
Option "ButtonMapping" "1 2 3 6 7"

@Titus
As Drew indicated, were there any other changes to your xorg.conf which
might have an influence?

Generally I am one of those thinking this has to do with something
kernel related, as this problem started after some "security" update. It
was not even the first Feisty kernel which this problem started with! I
also had suspected this problem occurring due to some firefox security
update, but as in my Edgy installation we should have had the same fixes
applied to firefox, the fact that I don't have the problem there,
somehow rules out firefox as the problem's source.