I take it Barclay's has changed the payment cut off time for the Aviator. The cut off used to always be 7PM Eastern, which caused a fair number of complaints from card holders on the West Coast.
This time, when I went to pay my bill, I found a new line in the fine print:
Cutoff time for same-day payments made online and by phone is 11:59 p.m. ET
So Barclay's brings themselves into line with the competing card issuers.