Can any one tell me what the following message exactly means?

*** DO NOT RESPOND TO THIS E-MAIL ***

The last processing action taken on your case

Receipt Number: xxxxxxxxxxx
Application Type: I485 , APPLICATION TO REGISTER PERMANENT RESIDENCE OR TO ADJUST STATUS

Current Status: Document OTHER THAN CARD manufactured and mailed.

On December 5, 2006, we mailed the document we manufactured based on our earlier approval of this case, and mailed it to the address on we have on file. You should receive the new document within 30 days. If you do not, or if you move before you get it, call customer service.