Love the plug-in, been using it for a few years.
But I just noticed that it now breaks a part of another great plug-in: All-in-One Event Calendar (http://time.ly, currently in version 1.9.1).
When going to Dashboard > Events > Calendar Feeds, there is a section called Feed Subscriptions that has two tabs, ICS and Facebook Feeds. With Ozh' Admin Drop Down Menu (version 3.6.4) activated, there is nothing below the tab headings. When disabled, the tab headings and their contents display and function properly.