When I change the maximum width the new value is not saved, and so the menu is applied as soon as the screen width drops below 960px.
This is only happening on one of the two sites I have it installed on. Both are using WP 3.4.1 and both have versions of PHP 5. There are different plugins installed on each.
I hate to hard code the value in the plugin code, do you have any ideas why the settings might not be saved in certain installations?