I was trying to upload my paper for NTF 2008 today using the My Papers submissions page and hit a couple of limitations that possibly should be explained
before someone tries to upload files:
- I had two files to upload - the presentation itself and a PDF copy for distribution. I decided to zip them so I only needed to upload one file. I selected the file and clicked the "Attach" button, After watching the progress bar for several minutes, I got an error message telling me that the filename didn't have one of the allowed extensions

- The individual files were of allowed types, so I tried to attach the PDF. Again after several minutes, I got another error message, reporting that the file was larger than the 1MB maximum

It looks like the file only gets checked
after it has been transferred to the server.
Apart from a 1MB limit seeming a bit small (I expected 8MB, which is a common HTTP file transfer limit), I could have saved myself some time if these limits were stated on the submission page, rather than only appearing in error messages, but I don't know how much control you have over the page content there.