I seen there is one number starting with A in the betitioner item in my I140 approve notice, after I check my I 485 receipt, find the number (A0XX XXX XXX) in my I140 notice is almost same as the number(AXX XXX XXX) except without 0 in I485. If I140 have not be approved, I485 don't have a A number. Because my I140 be approved on 8/13/07, my I485's receipt be sent on 8/16/07, it seem that before USCIS send me I485's receipt, they have checked my I140 status.