Q&A Issues: Voting not working, Images not showing in certain browsers

Hi there,
I tried to find a solution in your forums but was not able to...my site: http://bananalust.com/questions/
In Firefox and Google Chrome voting seems to not be working and I don't even see the arrow images showing up...in IE the images show up but I can't vote.
I've tried logging in both as a super admin and as a regular user (using a second account). I've also deactivated bbPress, Facebook connect and paid memberships pro to see if that somehow had something to do with it. I'd really like a solution for this since it is hard to skin without the functionality working. Also I completely uninstalled the q&a plugin and then reinstalled and no change.
Thanks very much for your suggestions and help,
Leah