We have made a huge overhaul of the uploader website as that means, we have rewritten it from the ground up. You will find the source code on our github organization.
That means the user interface has also changed. We hope it is now easier to use. Also pre-existing bugs should be fixed. Nonetheless, you might encounter bugs which haven't faced before. Please report them to us by sending an email to info [at] maniacdn [dot] net. Thank you!
As stated in the instructions, we review files before they are publicly accessible. Though, please save us the work of rejecting copyrighted content