[jQuery] Last two list items aren't being displayed in jCarousel?

Can anyone tell me why this is happening?

It looks like the width on ul#carousel is too short, and if I increase
it in Firebug it reveals the last two thumbnails, but I don't know how
or where this gets set.

Could anyone shed some light as to why the last two items are getting
cut off here?

URL in question: http://bit.ly/jn2LI

Thanks!