Galleries appear under menus since 2.0

Hi:

I use your plugin on my site and ever since the latest upgrade my menus started appearing under my menus.

Please the problem here: http://www.puertoricobygps.com/fort-san-felipe-del-morro/

I know this is a Z-Index issue but where can I fix it?

Thank you for an excellent plugin.

http://wordpress.org/plugins/nextgen-gallery/