I flew UA ORD-DCA a few weeks ago and the GAs were really cracking down on people with too many/too big carry-ons. They were gate checking them (for free, even) and made an effort to work the crowd before boarding. Saw several overstuffed carry-on bags fail the sizer test and the GAs were warning women that if they had a purse and a briefcase and a carry-on, they'd have to combine something AND pass the sizer test.

I got nabbed on the outbound leg for having a rollaboard, a laptop case, and a roll of drawings (something I'd done previously). I shipped the drawings on the way back.