Problem selecting verticies in 2.41 solid shading

[SirDude]

This is a dumb question but is maybe the little cube next to the
type of selection (vert/edge/face) clicked?
It limits selections so you can't select verts in the back of the mesh.
and in vertex mode is disabled.

[teachtech]

Ok... seem to have solved our problem with another video driver update. Our machines are using on-board Intel 82865G chips. Not the best, but if I update drivers with almost every new release of Blender, we do OK.