Hi, I am experiencing similar problems to Jennifer and Glenn with tksurfer; the (tksurfer) error message is:

surfer: ### redraw failed: no gl window open

and the display shows only a thin slice of the posterior of the surface.

The computer is a fresh install of RHEL 5 on a new machine, and my university IT department has updated the OS in connection with a Matlab installation. I believe they used run "yum update". I have tried both FS v.4.0.3 and v.4.0.4.

yours,

LMR