[Plugin: Facebook Like Button] Selectiverly Disabling the Like Button

The Facebook Like Button plugin is working well for me, but I had a couple of pages that I did not want the button to show up on. As I understood it the checkbox on the page edit screen under the update section is to selectively disable the button on that page only. When I tried it, checking the box persists to ALL pages, effectively disabling the plugin altogether. Is this a feature or a bug? Thanks.