OrderFax field in Table ps3_orders
I've got this fixed now, but this happened in two stores using PS3.
My stores use PayPal Express for checkout. Nothing is in test mode anymore, and both fixes have been added to the sites (script vulnerability and PayPal problem).
I placed an order using my personal PayPal account, was taken to PayPal, and redirected back to pp_confirm.php, but after clicking the "Submit Order" button, I was taken to pp_confirm.php again but it was a blank white page with a single sentence at the top that said something about the field "OrderFax" being invalid. (I don't have the error page anymore, so I apologize for not having the exact wording.)
The money was taken from my account and added to the store's account, and an email from PayPal was received by the store - just like the order was completed - but no order showed up in the Store Admin.
To fix it, I looked in Server Behaviors, eCart Store Summary in Database, and found there is no value assigned to OrderFax. It shows the type as Text, but there is no value. If I click the lightning bolt, I get a SQL sentax error, so I had to copy the value for OrderPhone, paste it to OrderFax's value, then change the instances of the word "phone" to "fax".
It works now, but this seems to be an error in the coding on this page. However, I couldn't find any posts on the forum that mentioned this same problem...