We have meekly tolerated this for years but now is the time to fix it. If I create a return type Purchase order, obviously the quantity has to be negative. THe amazing thing is that the system does not default a negative sign in the PO line. So you get an error. Then you have to manually put a negative quantity in. If something in functionality has no options and can only be one way, the user should not be made responsible to remember this. A returned type PO only allows negative quantity. THen make this quantity negative already so the user does not have to remember this minus sign.