Dropdown Menu Not working

I am currently using WP 3.2.1 and BP 1.2.9. I just recently updated both.

The problem - the dropdown menu for any subpages is currently not working at all. There simply is no dropdown. It previously worked. I only noticed this malfunction today and can not say for sure what I did to make this happen. I know I updated WP, but BP was updated after I noticed the problem.

Any help or thoughts is greatly appreciated.