Need someone to look into issues relating to Paypal IPN in regards to my Oscommerce shop. Some customers are getting a fatal error when returning to my shop from paypal.
I have also had numerous customers say that after going through checkout and returning to my webpage they are told that items are out of stock. This seems to be happening when they have purchased the last stocked item and have gone through the full checkout process. I have been unable to re-create the issue so I have been unable to work out why it is happening.