Just reported a bug in PO. Something similar has been around since 3.61 and the support person tried to tell me that PO was completely rewritten for 4.40 so of course the same error couldn't be around, but I was having none of that and told her about the AR Cash Receipts error that hasn't gone away since the dawn of the Windows product. WHATEVS! ANYWAY, the error is that if you have a PO and you invoice ONLY the freight (no lines), and update, it changes the status to Complete. Does this in 4.40.0-4.40.3, at least. I didn't check anywhere else.