I really like the idea of this plugin, so I don't have to do it with a personal hack, but it does not appear to be working for me. In the settings page I get the following in the Roles blacklist box:
Warning: in_array() [function.in-array]: Wrong datatype for second argument in /home/host/public_html/wp-content/plugins/admin-bar-disabler/admin-bar-disabler.php on line 322>Administrator
This line repeats for Administrator, Editor, etc.
I had the same issue in the whitelist box until I put in a capability in the Capabilities Whitelist box. I can't seem to get the blacklist error to go away though.
I also don't really see how to select which roles are permitted and which are blocked. If I only want Admin, Editors, and Authors to see the Admin bar, how would I do that?