No, not for a short trip like that. If in future you plan to take long trips, you'd have to apply for one, but chances of getting one are lower now after your extended time abroad. Do you intend to stay mostly in the US until you apply for citizenship? Then you should be fine.
ARC just means Alien Registration Card (GC), which they routinely stamp on LPR passports.
Last edited by cafeconleche; 6th April 2012 at 06:23 AM.
*** El Cafe ***
N400 - NYC (Brooklyn)
March 12 2010: Sent
April 7 2010: FP done- walk-in
August 3 2010: ID decision not made
December 12 2010: Lawsuit filed under 8 USC 1447(b)
March 31 2011: 31 Oath date
April 1 2011: Passport applied, picked up!