Secure Image Not Showing On Non Secure Pages

I know this is now a WPMU plugin but figured you may know as I cannot get answer elsewhere.

Just updated to wordpress https 3.1.2 and now my custom header css styling is not working except for the page that I have ssl enabled on.

Any help would be appreciated

http://greenprintlawns.com/ not working

https://greenprintlawns.com/easy-pay/ working

See different header and nav menu difference. Here is the css http://pastebin.com/dfZ9fuaD

Thanks

http://wordpress.org/extend/plugins/wordpress-https/