If you want to add any extra information, type it in the Note section.

You can have Address Book display a picture of the person or any image that you want. To add a picture, just drag any image file onto the square next to the person’s name at the top of the card.

When finished, choose Save from the File menu (or press Command-S). . . . were you doing this last and most important part?

Thanks for your thoughts. I tried pressing “Edit” at the bottom of the name card, then typing in the new info, and then I pressed “Save” in the “File” menu. Again, the new info disappeared when I pressed “Save.”

Any other ideas?

Hmmm. I’m not in front of my Mac but when I edit an address, when I’m done I don’t save. I click the same edit button – which closes the edit.

I just tested it and it works fine how netgrrl reported.

I’m thinking that maybe your permissions are a bit messed up. Try navigating to here and do a get info on one of the abcdp files. Make sure your user has read and write access.