There is a great plugin (which I read about on here) called Admin Menu Editor: http://wordpress.org/extend/plugins/admin-menu-editor/.
I am having a problem with this plugin - it works fine in the main site, however it doesn't work properly on subsites. The problem is that the options window for a window won't drop down. I made a short video demonstrating the problem - in the video you'll see that the menu's don't open on the subsite (seemingly because there is no content to open - see video to understand what I mean). They do open, though, for the main site.
Here is the video: http://screencast.com/t/ZGQ3MWI2NT
Any ideas on how to fix this? Thanks.