Please delete proftpd-nls[1] and proftpd-mysql[2], they are deplicated to the proftpd in [extra],the functioniy they provide has been inculded in proftpd.
[1]: http://aur.archlinux.org/packages.php?ID=18162 [2]: http://aur.archlinux.org/packages.php?ID=26024
