Got a bit of a strange one i cant seem to figure out.

I have simpleviewer working fine on IE, but on Firefox, it extends further than the div its contained in (or the div doesnt stretch to the bottom of the viewer)

www matt-terry co uk

You can see in Firefox the bottom of the viewer, and where the div stops behind it.

Any ideas on why this is only happening in Firefox, or how to solve it? Ive tried playing with height values in the CSS style sheet but nothing changes it,

Any help appreciated.
Thanks