If your registration transactions through Event Espresso and PayPal were working before but have stopped working today then it is likely related to a current PayPal IPN outage. Paypal is still working toward a resolution to the IPN issue. Another update at 12:00 PM CST. More info: http://t.co/XVIY9D5u
Update 12PM CST No resolution yet from PayPal. Another update scheduled for 2PM CST.
Update 10AM CST From the PayPal developer site:
This issue has been resolved as of Jan 29, 1:25 AM PST (Jan 29, 9:25 AM GMT).