On the Joomla 3.3.1 site I have running at Robosane.net, the only dropdown menu that I have is experiencing a very odd problem, it's hard to explain.
When the menu is clicked, it does not pop up until the mouse leaves the hover area, then re-enters. The menu also does not close when it's parent is clicked.
This is a custom template I made, here's how the frameworks are listed:
You can see how I intended for this to look by visiting robobenklein.github.io/robosan3, which is only a static mockup of the page.