I have used selenium 2.31.
I have used Actions class for mouse movement. Using this I moved the mouse over a menu and its submenu appeared only for a fraction of se
This answer helped solve my problem.
My challange was to find a link under a menu option. The link was not visible until I hovered over the Menu.
This crucial part for me was finding out that in addition to hovering over the menu, I next had to hover on the link in order to interact with it.