recently, i had a RH 6.0 system with a MilleniumII video card.  I upgraded
the video card to a Voodoo3/3000 and used the then only available X server
(not even a part of XF86 at the time, i believe) for it.  Everything worked
great-- except for the tool buttons in Netscape.  They still show up, but
only as like black outlines.  My first thought was that Netscape just
couldn't allocate the colors, but X is running at 24bpp and everything else
always looks great, no matter how many different (color-intensive or not)
apps I run at a time.  Not long later, I formatted this machine and
installed RH 6.1.  This time, I obviously didn't have to go through any
trouble setting up the X server for the Voodoo3 because its now part of
XF86, yet I seem to be having the same exact problem as before.  On the RH
6.0 system, I was running NS 4.7 (tarball from netscape).  Even on the
fresh install of 6.1 (using NS 4.61), the same thing happened.  So because
Netscape is the only app that anything like this happens with, I'm inclined
to believe its a bug in Netscape.  However, recalling from experience,
problems like this usually lie in the app not being able to allocate the
colors it needs.  Any thoughts?