Public bug reported:

Binary package hint: freeglut3

When a compositor (Compiz is the only one I tried) is active and an Xlib
version of Mesa is selected via LD_LIBRARY_PATH, GLUT windows appear
transparent when they shouldn't.

Setting XLIB_SKIP_ARGB_VISUALS works around the problem.

http://www.x.org/archive/X11R6.8.0/doc/RELNOTES5.html, section 5.3
claims that this problem is with the application mistakenly using a new
visual, exposed by the Composite extension. The release notes also claim
this won't affect most users, since Composite isn't enabled by default.
This is not the case for Xorg on Ubuntu (at least).

This is on Ubuntu 8.10 and 9.04. freeglut3 version 2.4.0-6.1ubuntu1 (at
least) is affected. The xlib version of Mesa was built from the January
22nd Mesa release (7.3).

** Affects: freeglut (Ubuntu)
     Importance: Undecided
         Status: New

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GLUT windows are transparent when compositor is active & xlib mesa in use
https://bugs.launchpad.net/bugs/369891
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