Category menu appearing under SWF

I’m having a peculiar problem where the cart’s category menu appears underneath an SWF file on the homepage.

An example can be found here: [URL=“”][/URL]

I’ve tried creating a new div class (where the embedded SWF sits) with a z-index of “-1”, however this doesn’t seem to do much.

Has anyone else encountered this problem (and solved it)?

(version 1.3.5 SP2)