I've been trying to upload a few packages for hours now, and the server just times out. I even went and checked the Cooker development page to make sure I was using the right URL (ftp://ftp.linux-mandrake.com/incoming/). The address resolves to 63.209.80.249, on a few different nameservers, so I assume the problem is with the FTP server itself--either it's down, or it's been incredibly busy.
I've already sent out the emails for these packages; when I get back later today, I'll try the uploads again.