glBlendColorEXT problem on GeForce 3

I use Linux RedHat 7.2 with GeForce 3 Ti 200, with the latest drivers from nVidia, and noticed that glBlendColorEXT does NOT work. Since we have a complex app, I’ve made a simple glut app to test glBlendColorEXT, and it didn’t work. I’ve put the same simple program on an SGI O2 workstation and it worked perfectly.
Did someone else encountered this problem? If needed, I can send you the simple glut app.