Site crashing in IE 7?

Hi! I’ve been tinkering with the website walkfriendly.ca – I’m still a WordPress newbie – and while the site seems to display without issue in Firefox, Chrome, and IE8, I’ve gotten some feedback that other versions of Internet Explorer have been crashing.

I’ve tried a few of the various online compatibility tests, but it seems to be rather inconsistent. The IE-Tab plugin for Chrome seems to display it, but browsershots implies it can’t load in IE7.

I apologize if this is a very basic issue. The site isn’t very complicated, but I’m concerned that there’s an installed plugin that might be screwing with compatibility. Any help you can suggest would be greatly appreciated.