Author Avatar does not display

I am using the Farms 133 theme pack on WordPress MU 2.9.2 with Buddy Press.

Author avatars are not displaying. I've checked to ensure the users has an avatar uploaded, but they still do not display. I am including screenshots of plugins, the user list to show avatars appearing there, and a screen shot of the Author block on one of the themes.

Any ideas of where I should start troubleshooting this problem?