I bet the reason it does that is because she set your browser settings to where you can only see images from that certain server and no off-server images will be allowed. And since TamaTalk doesn't host the images, it requires them to be hosted and you provide a URL to the image yourself......They would be considerred 'off-server' images. And I can help you get your settings back if it IS that problem, and if you are using Mozilla, or IE. Hope this helps!
~Tamagod
(P.S.) Can you see Vince's avatar? Because if you can, then we have our problem solved because his avatar is an 'on-server' image that comes pre-installed with IPB. ^^