I made a mistake at the bugreport. It is not true that synaptic/gnome-app-install/update-manager minimises when trying to move it to another workspace. It disappears, but stays visible on the window list, without square brackets around its name in gnome, meaning it is not minimised. Instead, if I minimise it first (so there are brackets around its name), then there is no problem and I can move the application to other workspaces. Hope this helps finding the source of the bug.
-- Unable to move synaptic to another workspace https://launchpad.net/bugs/36443 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs