plugin code not passing w3c standard

I’m currently using the Newstatic plugin on my website http://wordpress.org/extend/plugins/newstastic-post-slider/

but when I use w3c validation service, it came up with lots of errors. I think it’s the resizing image php code

Line 195, Column 246: & did not start a character reference. (& probably should have been escaped as &.)
…wordpress/wp-content/uploads/2012/10/single_page_adv2-150×150.jpg&w=60&h=60″ />

This is the website: http://camberwelldragons.com/

w3c validation website http://validator.w3.org/

Please help me!
Thanks