The Arras theme is a great and widely used theme for Wordpress. This is just a short post for anyone having trouble figuring how to add pictures to the slideshow on the front page.

This normally occurs with drop down menus being hidden behind other elements on the page.

There are two issues to watch out for. Firstly, z-index WILL solve it. But z-index only works on elements that are positioned (this is required for firefox). So you may need to insert 'postion: relative;' into both the Menu style and the object that it gets hidden behind.