[Gimp-user] xubuntu 12.10 gimp 2.8 no toolbox

["linux-service.be bvba" <guy linux-service be>]

Setup:
xubuntu or kubuntu 12.10 and gimp 2.8.
Normal screens: gimp and toolbox ok.
Seperate xscreens nvidia: gimp 2.8 toolbox gone in single window or not single window:
You can even see desktop shortcuts that are behind the gimp window in the toolbox area.
see
http://www.multiseatcomputer.be/gimp.png
No additional errors when started in terminal

Gimp 2.6 : no problem toolbox