United is now using Consolas font to display confirmation number on the View Current Reservation page. Consolas is a monospaced (non-proportional) typeface which lessens visual confusion between the number 1 and the letter I, or the number 0 and the letter O. It's a change that is welcomed by this stable genius.
https://en.wikipedia.org/wiki/Consolas
Good for readability, but it shows my PNR a lot smaller than other relevant text near it...