I noticed something strange lately, I have had 2 payments this week with paypal that did not complete. (but they are transfered correctly to my business paypal account, so the user payed correct.) I checked the log and i see the following message:
Date Wednesday, January 2, 2013 - 22:54
Message IPN failed with HTTP error , code 0.
I never had this before.. any idee? This happend suddenly, normally all paypal payments go well, i normally have around 10-20 payments with paypal a day, i didn't change anything on my VPS and i checked my firewall and can't find any issues.
(to make it clear, all payments go still well... but this error happends ±1 time a day, because it happend in 2 days 2 times.)