I just got off the phone with MyPoints because my account has been listed as "disabled".
Apparently, something happened this weekend to a number of accounts and has caused this problem. I was trying to redeem some MyPoints points for a reward and have run into all sorts of problems.
They said that this 'glitch' should be fixed in the next few days. I asked them to post something on the main home page of MyPoints explaining this problem because it appears to affect lots of people..
Stay tuned...