However, with firebug enabled, an unsuccessful load will hang either during the processing of boxec18_enc.js or the loading of boxec5_ship_src.js. You can try it yourself at http://conchtees.com.
I thought it was something I did wrong until I visited some other e-junkie stores with the same result. Not sure what causes it to hang there, and it's likely a firebug bug, but I figure the e-junkie developers might be interested in knowing this is a problem because a LOT of people have firebug installed. What makes it so strange is that even unloaded pages still seem to function properly as far as adding items to the cart and checking out. (I think.)