Since a while I cannot use gimp tools on images anymore.
It is not possible to use any of the tools of the toolbox.
When I select a tool (either from menu or from toolbox), I get the tool (e.g. rectangular selection, or brush, or whatever else) as mouse pointer, but when I click and drag on the image, nothing happens.
Also the context menu doesn't open when right clicking on an image.
Other image manipulations, such as rotating, coloring or applying filters are working without problems.
I've gimp for Mac 2.6.11. I removed an reinstalled gimp, problem still exists.
On an other Mac the same gimp version works without problems.
Has anyone an idea what could be the reason for this strange behaviour ?