[Plugin: WP Smush.it] WPMU error

Trying to use this plugin on WPMU and when attempting to update the setting (to overwrite gif with png) I get this error:

Error! Options page not found.

From googling the issue, I found a post from Donncha that says to contact the plugin author and send them this link to show them how to fix it:
http://planetozh.com/blog/2009/05/handling-plugins-options-in-wordpress-28-with-register_setting/

Has anyone gotten this to work?

http://ww.wp.xz.cn/extend/plugins/wp-smushit/