strace shows that when ftp is started that it opens /etc/fstab then cds to every entry including (/mnt/cdrom and /mnt/floppy). This in turn causes autofs to mount any nfsmounts in /mnt. This happens for both anonymous users and regular users every time there is a login. I'll accept that there's a reason for ftp to be doing this, but we're mighty curious about the reason. :)
Um, perhaps you mean wu-ftpd. Changing component...
This most definitely doesn't happen here. Which type(s) of authentication are you using? Are your users' home directories on NFS?
Closing due to lack of user input
This should be reopened. It's irritating to wait for CD, hard disk, and network mounts to initialize. A demonstration of the bug can definitely be arranged.
Must be something else he's doing. Non-duplicatable. Close this ticket.