Comment 18 for bug 786317

I haven't tried ocelot yet, but on Natty it is only a problem with Unity -- ie going back to gnome removes the problem.

When you look at the output from "xinput" it seems (and I'm not experienced here) that the driver is generating the right combination of ups and downs.

So it seems to be some interaction between unity and some strange assumption that gimp is making (because I haven't seen any complaints about similar applications)