As I said, my GL headers come from the CVS pull from the DRI, not from any pre-packaged headers.
Well, I think the problem comes from one of your OpenGL headers... Can you do a 'grep GL_VERSION_1_3' in your GL headers (mostly GL.h I think).
From what I suspect, you will get something like this :
#define GL_VERSION_1_3 1
The problem is that your OpenGL library is NOT implementing GL 1.3 (as shown in your glxinfo output). This means that you have a mismatch between your system headers and your library.
This could be considered as a bug to report to the DRI people (if they really provide a gl.h which defines GL_VERSION_1_3, they should also provide a library with all OpenGL 1.3 entry points).
We *could* fix this in Wine by adding yet another configure check (or going the full 'GetProcAddress' way which would be needed if we wanted a nice OpenGL packaged Wine) but well, sometimes enough is enough and stuff should be fixed outside of Wine and respecting the rules instead of adding yet another work-around.
Lionel