After Kevin is fed the broccoli, his chin is clean, right before the spit-take, it's covered with broccoli flowers (with any luck, this means they had to do the spit-take multiple times).
This is supposed to be taking place in January (in Scranton, PA) yet when Darryl, Andy, and Dwight walk into the bookstore the trees in the background are green.
After Michael is shown gummy bears and gummy worms by Ellie Kemper's character, Steve Carrell says "Come on, Parin," - mixing the names of the former receptionist (Pam) and the current one (Erin).