I have implemented the custom upload handler and per the demo and it all works fine except, for uploading any images larger than 2 mb.
The file gets uploaded but,the images are corrupted.
Also, I tried creating a thumbprint of the file as it is being uploaded but I get and error when trying to creating and image from the stream.
throws error "invalid parameter".
I would guess there is some settings in web.config which have missed but I can't work it out.