I needed to check a couple of my sites in different browsers and i came across these sites, maybe they could help you too.
http://browsershots.org/ - free
http://www.browsercam.com/ - free 24hour evaluation
http://www.url2image.com/ - not free
http://www.danvine.com/iecapture/ (PC) - free
http://www.danvine.com/icapture/ (MAC) - free