Using VisAd with Mesa on Linux, I am getting this error: Mesa implementation error: Bad format (GL_MODULATE) in apply_texture Report to Mesa bug database at www.mesa3d.org I am using Mesa-3.4-13. Do I need to move to Mesa 3.4.2?
I don't have access to a 3.4-13 to test your symptoms, but everything works ok for us with 3.4.2. I guess the Mesa guys don't want to hear about bugs in anything but the latest release, so upgrading is your best option. Andrew.