[jQuery] Malsup Form: problem with upload of big files

[Mj]

Here I have a test page:
http://wmviking.ru/test/1.html

There is no problem to upload small files, but if I choose larger (for
example, 2MB) - upload crashes without normal execution. I put simple
and ajax upload on example to check that in one case it works
normally, and in another - crashes!

What is wrong, Mike? Help please...