Didn't find anything in the mailing list archives or faq:
I've set my physical display (WinNT) to 1152x864. When using X -rootless
-multiwindow,
xdpyinfo reports a screen #0 size of 1152x836. Running X with no special
parameters, xdpyinfo returns 1146x811.
It makes no difference, if I use the
HJB,
-rootless and -multiwindow CANNOT be used together. Use one or the
other and knock off this silliness.
You aren't reporting that any area of your screen is not being covered
by the Cygwin/XFree86 window. Have you noticed the Start bar at the
bottom of the screen? It is about 30 pixels
