The Glui controls (buttons, checkboxes) are sometimes
invisible on my machine, for instance in example1,
whereas the other examples work well. The same problems
occurs in other Glui applications, It seems that this
bug was known in earlier versions and should have been
fixed in 2.1, but I am using 2.2 (compiled from source
under Linux) and still have this problem.
Slackware Linux 10.1 on Intel Pentium4, Kernel 2.4.29,
x11-6.8.1 from x.org with OpenGL-1.2, glu-1.3,
glut-3.7, nVidia accelerated driver set 1.0-6111.
Glui_2_2 downloaded from sourceforge, compiled with