UA Insider, could you please keep track in your master list post #1 of the issue that on the new united.com sometimes the "Upgrade" option is not displayed at all for some reservations.

I booked a few days ago 2 itineraries with e-certificates (I would guess it's the culprit but it could well be another factor). The tickets are issued, no current schedule change, but I still cannot see an "Upgrade" link (and it is displayed for the older, non-ecert purchase).

I've noticed that it also has been reported in this thread (various posts, including #15, #20, #21, #22...).

Also, I'm hoping that the inability to see the "Upgrade" link does not preclude the CPU to run properly on those itineraries...