Xilinx again:-)
This patch
http://cvs.winehq.com/patch.py?id=1030574123182059719300927
causes a bunch of error messages when scrolling the main window in fpga_editor. The scrolling however works fine. This is repeated for every "sliver" (or whatever that is called) as the window is scrolled.
trace:nonclient:WIN_UpdateNCRgn hwnd 2005a [1e12] hrgn 0000, unc 0005, ncf 0 err:region:CombineRgn Invalid rgn=0000