What steps will reproduce the problem? 1. Select any brush 2. Try to paint doing several double clicks on canvas. Sometime the window will minimize (like you do a double click on window header)

What version of the product are you using? On what operating system? Gimp 2.6.8, GPS 1.4.

Please provide any additional information below. MAC OSX 10.6.3 on Macbook white with Xquartz 2.5.0

It's only happen when using 2 monitors!