Received PayPal but no order showing

I have been having this problem intermittently. It's only happened a few times, but I have no idea why it's happening. I received payments via PayPal, and I get the notification of payment from PayPal, but there is no order showing up in Zen Cart for the purchase. I have been issuing the customers gift certificates for the amount and having them go back in and place a second order as a work around. Still, I would like to know why it's happening to start with, and why it only happens occasionally, not with every order. I am using 1.3.0.2.

Update to add that I went in and removed Order Tax module, which I read fixed some other people's similar problems - and what - the orders magically showed up in the ZC admin!

Glad that you have things working ... not sure why that would help in this case ... :unsure:

NOTE: You may wish to look at upgrading to v1.3.6 ... this release is much more stable, bugfixes and security issues fixed and has more features to it ...