Not sure if this has been reported, but today I tried to book a ticket for this weekend (Sat-Tues). Both days were within my upgrade window so I made sure to pick flights that said Available. I got all the way to the final screen selected seats in the F cabin and all was fine. When I clicked Purchase it stated it had a problem assigning my seats and when I looked it didn't upgrade me, but my upgrade status was "Requested". It took a call to SMS who was very confused and they finally forced the upgrade in. So something about the upgrade being available really jacked things up.