Originally Posted by Brian
Generally a white page like that either means that the image is larger than the PHP max upload size, or that there isn't enough memory for GD to resize the image. If that's not the case though and you'd like to submit a support ticket via the Members' Area here then I'll be glad to take a look at things for you.
I'll check those out when I get the chance, I'll up the pixel limits and see whether it loads. Pick up my URL from my account, I've enabled public phpinfo for you if you want to give it the once over. If you've got a support ticket from SNW I'll leave you with that one, I've got a test instance you can play with if you need a second example.