gnome-display-properties: refresh rate?

[Maurice F. Piller]

I've installed ubuntu on two different machines (i386 and amd64) and have
experienced the same problem on both machines. Using the screen resolution gui
(gnome-display-properties) I am able to select screen resolution from a list of
options (and it works), however there is only one refresh rate offered, 60Hz. I
would like to be able to adjust the screen refresh rate.

Enjoying ubuntu very much so far!

Thanks,
Chip