ZC 1.5.0

As far as I know, my pages are all using the same stylesheet... so I'm not sure what is causing this to happen...

Here is my shop: http://opalessenceshop.com

Almost everything fits very nicely into the window...the categories, the EZ Pages, the testimonials, the "Information" pages... it's fluid so it adjusts when you resize the window, etc... but when you click on a product, the product description page (for example, this one) gets all wonky on the right side. The right side column moves outside the bounds of the main table/div/area/whatever and causes side-scroll (at the window size I use, anyway) and the contents of the center area spill out over the border that defines the center column. I'm using Chrome, if that matters. Anyway, I can't figure out what is making it shove over like that.

I am NOT a CSS expert. I've sort of "learned as I've gone" over the years and don't always know why certain things work the way they do... that is, I don't always understand the theory behind the things I'm implementing. The logic, as it were. For that reason, I'm especially bad at troubleshooting broken CSS. I'm hoping someone a little more fluent in it might spot some obvious mistake that I've made so I can fix it...? *crossing fingers and toes*

Thanks in advance for any help.