The XFree86-xserv-4.3.0-15 package has been updated in the Cygwin distribution.
5) winmultiwindowwndproc.c/winTopLevelWindowProc() - Add processing for WM_WINDOWPOSCHANGED to cause window to repaint when using TweakUI's focus-follows-mouse behavior. (Harold L Hunt II)
Wonderful!
Thanks. Cliff.
