zenphoto1.2.7インストール時エラー

uploaded folder [permissions failure]
Error!
Setup could not set the folder to the selected permissions level. You will have to set the permissions manually. See the Troubleshooting guide for details on Zenphoto permissions requirements.

ぐぐってもこんなエラーでてこないぞw

どうやらこれはuploadedディレクトリが無いとのことなので

sudo mkdir uploaded
sudo chmod 777 uploaded

なんでzenphotoが777を推奨しているんだろう・・・？