Refiled I-485 on 11/23/2013, almost 5 months, called USCIS (Lincoln), got this letter again:
I remembered PJ laoshi said, it's canned language, should I call them again every month or just wait? I called USCIS for my previous case two years ago, and got the same letter, then didn't get any information for more than 12 months, after discussed my attorney, I refiled 485 with my current company. It took me almost two years to get here.