My CC doesn't work at the kiosk and hasn't for months. I complained to US a while back and they added my middle name to my account (there was no way to do it via the website, not sure if there is now). That worked for a while and then stopped working.

Last night I tried swiping my DM card and it worked like a charm. I'll be doing that from now on. I had been using the first/last name lookup, but this is much easier.