Yea I noticed that on my second machine... The older machines can't load imagemaps larger than 256
The skin came this way, so I'm kinda stuck with it... and it works ok on my main and I like the size.
I'm doing up my own UI from scratch and when I do that I'll keep everything under 256x256 for sure... it really annoys me that I have to switch UI's back and forth when I change machines
Thanks for the heads up though!