http://bugs.winehq.org/show_bug.cgi?id=12599
--- Comment #7 from Lucas Murray lmurray@undefinedfire.com 2009-02-15 11:14:50 --- "(May be related to another bug where CS2 panels refuse to be moved below the same height)"
Just found out that this is unrelated. If I manually change the _NET_WORKAREA X window property on the root window to contain the full area of both screens the panels can be moved below the break.
This has no effect on the painting bug however (Which still occurs in 1.1.15).