5 hours on reservation screw-ups today and still no resolution! The website would not accept my United Visa! Chase confirmed that there was no problem but there had been nothing processed by United.com. United.Com was a mess--after three tried (3 hours), finally got through then got disconnected when their computer went down. Tried to rebook, again, online and fares had almost DOUBLED! Could not get thru on any phone lines. Grrrrrrrrrrr. What a way to run an airline.