[aur-general] Errors on submission: Invalid name: only lowercase letters are allowed

I tried adopted this package (kernel26-yi) http://aur.archlinux.org/packages.php?ID=37895 But when I tried to upload an updated PKGBUILD. I got rejected with "Invalid name: only lowercase letters are allowed" I used makepkg --source to generate a file named kernel26-yi-2.6.37-1.src.tar.gz. Why am I receiving this error? Thanks. andrewthomas