Zen-Cart has been working fine for me up until a few weeks ago. Now I'm having a problem receiving the customers cart contents when they pay via Paypal IPN. The order is recorded in Paypal but the cart contents are not sent back to the store. I therefore have no idea what shipping method was chosen and the stock quantities are not deducted. This happens with about 80% of my orders 20% are ok and sent back to Zen-Cart and recorded.

This wasn't a problem a few months back but now happens on a daily basis. Do you think there is a problem in my database, or could there be a corrupt file somewhere? Or is it just a pay pal problem?

Thanks for your help.