I have been using Paypal both Payments Standard and Express checkout for years. As of Sunday at midnight, all my orders using Payments Standard get stuck in the initial order status. No payment information is posted to the order nor is the order moved to the status I have configured to move it once the IPN has been received.
In the log all the PS logs show a red icon rather than green. They do not show "VALIDATED" on the bottom. The "_notify-synch" log is also different - only 5 lines rather than the customary information with more verbose order information.
Went through files and nothing on my end changed. I also did not find in Paypal's docs any information about a change to the API as of Sunday night.
ANY Help would be appreciated, as it is causing a headache for order processing.
* UPDATE * I've avoided the order processing headache by disabling Payments Standard and moving all customers to Express Checkout.