i'm having the exact same problem
the moment i use a custom tem plate like thunderchicken or terayon, rawr...
the page will not load correctly
i tried from another computer on a different ISP and same problem
i tried it on my iphone 3g, another network same thing
simple workaround is to use the default template or something very watered down
those fancy templates, like rawr and thunder chicken may not be compatible anymore and over and over they dont load correctly.
if i hit the refresh button enough times it eventually loads proper.