SoGLTextureMatrixElement(3) on Linux
The text 39a08d54809b, as Debian 7 (Wheezy) shipped it. The page shows this text now.
The SoGLTextureMatrixElement class is used to update the OpenGL texture matrix. Since (for some weird reason) most OpenGL implementations have a very small texture matrix stack, and since the matrix stack also is broken on many OpenGL implementations, the texture matrix is always loaded into OpenGL. We do not push() and pop() matrices.