Certain apps (Skype, Office for Mac 2010 or something like that) fill the background of the screen when I open Mission Control. When Mission control is focused on the space the app is in, all is well. When I switch to a different space, however, this happens. It is consistent (i.e. the same apps always do this, every time), and annoying. I've tried to find workarounds, but I haven't came up with anything. Any help is much appreciated.
(Note that I rearranged the window to hide my contacts, but it has the same effect with the window maximized or in full screen.)