I had access to front row seating on both domestic and international, as well as some exit row seating.

When I can select exit seats they were assigned with no disclaimer prompting.

Interestingly, I had a domestic reservation made late last week which had 5C/5C on showing as preallocated 73H flights.

I could change the 5C to a 4C or 4D on one flight and 4D is showing available on the other segment but any attempt fails with the error "At least one of your specific seat requests could not be processed. (4631)".

I was able to move from 5C to 4C on the first flight but I now have 4C and nufin! (Verified with www.checkmytrip.com.) I can select from many seats on this flight but it fails as stated with any attempt.

Note the latter flight is on Friday and quite "Sold": ( J2 D2 I0 B9 H9 K9 M0 L0 VC SC NC QC OC XC E0 )