Hello, first of all: I'm not sure this is a GIMP problem or an XFCE problem. But i think it happened after GIMP froze and I had to use ctrl/alt/del ... I'm not English but I will try to explain what happens.
I'm using Xfce 4.8.
I use 4 workspaces. When I open GIMP in a workspace everything seems to be normal, I have the main GIMP window, the toolbox and the layers-window. I can use GIMp the way it is intended, no problems.
But when I switch to another workspace, the toolbox and the layer-window are there too, NOT the main-window, and they are in all workspaces.
In fact these windows seem to be made "sticky", but there is no way to switch them to "un-sticky", I even can't move them to another workspace (there's no option to do that), this I can only do with the main-window which is only in the workspace I started GIMP in.
Another thing: when I move the main-window to another workspace all Gimp-windows disappear from the other workspaces, everything seems to be completely normal as it was before, GIMP is only in 1 workspace, but from the moment I open the workspace containing GIMP the toolbox and the layer-window are back on all workspaces ....
Confused? Me too
Believe me, I did almost everything possible to fix this, but nothing helps.
I would appreciate if somebody could help me to fix this problem. Feel free to ask if you need additional information.