I got this error again... Seems like every month or so, I have to go through my ICQ list and cull out contacts that I have either never used, or haven't used in years....
Here's the Q&A in case anyone needs to know!
Q. I am trying to add a user to my Contact List, but I get a "Message Code 133". What does this mean?
A. This code means you have too many users on your Contact List. The maximum number of users you can add is 600. If you wish, you can organize them into groups, and each group can include up to 250 users.
If you receive Message Code 133, we recommend you delete a few contacts from your Contact List to make room for new users.