Product Pages Breaking Site

I got the installation and everything working, then added a few items to see how the whole site behaved.  When I went to a category that has items, the site breaks and gives me the following error: "We're sorry, an internal error occurred that prevents the request to complete.  Our supporting staff has been notified with this error and will address this issue shortly. We profusely apologize for the inconvenience and for any damage this may cause. You might want to try the same action at later time."

When I visit a category without any items in it, the site is fine and just returns nothing.  Does anyone have any insight as to why?  I've gone through the admin panel so many times, but I think I'm missing something obvious.

http://store.imaginebliss.com/c/19/headpieces
Pins and barrettes have items, the other categories don't at this time.  I don't want to put the entire inventory in if I have to delete it and reinstall etc to make it work.

Any thoughts?

https://www.nopcommerce.com/boards/t/14512/changing-producttemplatesinglevariantcshtml.aspx

Thanks for the fast reply.  I'm now getting a Server Error of

500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.

Usually when I get this it has to do with a bad .net call, but I don't understand Nop enough yet to figure out where to pinpoint the error.  Since it only happens on pages with product info, could it be the way I setup my products in the Admin panel?