I am in the last steps of testing my store and everything seems to be working fine except when I make a test purchase of $0.01 with a test user.

The order is shown in admin.
I get the paypal email about the payment but no order confirmation and the test user gets the order confirmation but no payment email from paypal!

I have read all the threads about paypal ipn and have triple checked my ipn setting. Ipncheck says everything is okay.
What could be the problem?

I run the current version of zen and have installed image handler, lightbox, sales report, admin profiles.

My webhost is UCWebhost and I am using a ssl certificate.