Quick Notice Bar Pro 2.1.0 incompatible with WordPress 3.5. After upgrading to WordPress 3.5, I was unable to add Media to Pages or Posts. After debugging, I discovered that several references were for Quick Notice Bar. I deactivated the plugin, and it was not resolved. I deactivated all plugins and problem was resolved. By activating each plugin one at a time, it was found that only when I activated Quick Notice Bar did the problem return.
All is currently working properly with Quick Notice Bar Pro 2.1.0 deactivated.