Looks like PayPal has posted public acknowledgment of some IPN delays at present (see below).
If your E-junkie orders are not getting processed immediately after PayPal payments are completed, this would be the reason why, although they should finish getting processed eventually as PayPal catches up with their IPN backlog.
Feel free to use your Seller Admin > Send Free Download Link/Codes to satisfy concerned buyers; if you do this, you can also enter their PayPal Transaction ID into Admin > Block Transactions to prevent another link/code being issued to them once their IPN finally does come through.
(Live Site-527)  Notification - PayPal IPN Delay - Dec 15
12-15-2008 09:11 AM
PayPal_Updates PayPal_Updates Administrator writes...
 Notification: This notification is to inform you of the following issue with IPN. IPNs are currently delayed.
(Sent Dec 15, 9:11 AM PST by AP)
Service: PayPal Live Site
During the time listed below you may have or currently are experiencing the following:
IPNs are delayed.
- Order Management (IPN / PDT)
Start Time: Dec 15, 6:20 AM PST (Dec 15, 2:20 PM GMT)
End Time: On-Going
Our technical teams are working diligently to resolve the issue. We will provide updates until the issue is resolved.
We apologize for any impact caused by this incident.
PayPal Merchant Technical Services
If you have questions, contact PayPal Merchant Technical Services by filing a ticket under contact support (refer to ID: Live Site-527) at https://www.paypal.com/mts/.