#402 R128: bits of underlying window visible

[Joesph Krahn]

Using R128 with two overlapping OpenGL windows,
intermittant fragments of the underlying window show
through. To see this, just run "gears" twice, and place
one partly covering the other. Strangely, what shows
through from gears is full cylinders, with the gear
teeth filled in, so it's showing parts that aren't even
rendered in the underlying window.

Secondly, does anyone read these bug reports now days?
Is it better to send bug-reoport email?