[arch-general] Weird makepkg problem

Hi. I'm the maintainer for the todotxt package in the AUR (http://aur.archlinux.org/packages.php?do_Details=1&ID=7673). While I was trying to update the PKGBUILD today, something really peculiar happened. The todotxt source gets downloaded in a zip file format. But instead of unzipping the zip file to the src directory, for some reason makepkg is *copying* the zip to the src directory. Consequently, the PKGBUILD can't find the files it needs and fails. Anybody know what caused this (it wasn't always this way, as I've been maintaining this package for over a year now) and how to fix it? TIA, DR