Comment 7 for bug 684019

Okay, this bug annoyed me very much, so I identified it in the source code. What really happened: Whenever you first move a window to a different viewport, the target viewport number is appended to a list. When you do it again, the old entry is not removed or updated; instead a new "viewport" entry is added (which also is a small memory leak). Afterwards, only the first "viewport" entry in the list is ever read on moving a window, so all subsequent windows will be sent to the viewport to which the first window was moved (it can also be the first, third, fourth or any other one).

A patch proposal is attached.