After activating the plugin in a 3.0.x WP installation, there is no "save changes" button in the settings page in wp-admin.
A look at the error log reveals this:
PHP Fatal error: Call to undefined function submit_button()
According to this: http://codex.wordpress.org/Function_Reference/submit_button it looks like that 3.1 is a prerequisite, not 3.0 as stated in the plugin page.
I'd appreciate some help in circumventing the submit_button() issue in the 3.0.x installation.
Thanks and congratulations for a great plugin