Upgraded WordPress to 3.6.1, and all was good. Upgraded NexGen to 2.0.30 and got some kind of php error. Deactivated it and reactivated and found that my drop down menus are gone. Deactivate and they come back. Theme is Mazine 1.4.1.
I tried installing an older version of NexGen, but I still have the same problem with the menus.
I have deactivated it at http://www.flsprayers.com.