Wierd BUG - LOTS of triangles not drawn!

[Fowler]

This happens on every single test program I run - Loads of triangles
are just missing. I have no MESA environment variables set.Ive included
screenshots of the problems
If theres anything more info I can supply to track down this strange
behaviour I will gladly supply it!
I assume theres either (a) a small bug thats cropped up for some reason
or more likely (b) Im doing something wrong  :)


X version                                       :Xfree86 3.3.3.1 SVGA server
Mesa version number                             :3.0
Operating system                                :Linux 2.2.3 x86  (Redhat 5.2)
Compiler (and version)                          :pgcc 1.1.1
Compile options                                 :same reults with `make linux` and 
Voodoo 2 Glide
GLUT test programs which isolates the problem   :All programs tested....
( book directory )

thanks in advance

        Colin Fowler.

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