I have been using the Slash theme successfully on my website 1Journal.com and then recently added SSL to the site. After I added SSL, then the top menus seemed to stop working when they were drop-down menus (i.e., when they had child menu items). After playing around with it a little, I found that if I select the "Show as expanded" for the parent menu item, then it will no longer work for my site. That is, when the "Show as expanded" is enabled, then I can click on the parent menu item and there is no response. It is as if it is disabled.
So my solution right now is to not have drop down menus. I don't enable "Show as expanded" for any of the parent menu items and then people have to use the menu block on the pages for navigation. It would be nice to have the drop down menus working again, though. Does anyone have any suggestions for this?