Dandelion WordPress Theme – Drop Down’s Don’t Work After Upgrade

I was just working with a client website. Upon upgrading their Dandelion WordPress Theme to 2.8, I noticed that their menu item drop downs were not working. After some unproductive research on the Themeforest page and the theme creator’s support website, I went back into the client site. I noticed that under Appearance –> Menus, the ‘default menu’ for the site was not selected. I selected my main menu as the default, saved, and then looked at the site. All was fixed.