Problem Adding Feeds via AutoBlog

Greetings -

I'm testing out plug-ins on a new Wordpress MU install and have encountered a problem adding a feed to Autoblog. Plug-in installation went fine as well as network activation. When I add a feed (after filling out the details), I get a screen with the message "Are you sure you want to do this?". However, there are no buttons to confirm ... just the message. I note that the same behavior occurs when nothing is filled out in the "add new" screen.

I'd appreciate help.

Thanks,

Tlewis

Wordpress ver 3.1.3
Autoblog version 3.4.2
Browsers: tried in IE9, Firefox 3.6 and Chrome 12