Factual error: It's Thanksgiving and Ray and Frank want to watch football. Ray's mother changes the channel to the Macy's Thanksgiving Day Parade. But these programs are not on at the same time. The parade always ends at about noon. The first game starts at about 1:00 and the second game starts at about 4:00.
Continuity mistake: Ray offers to rub Debra's feet instead of doing another chore. He takes her black socks off and throws them on the floor, under the table. The socks can be seen for a few shots, in the same spot, after Robert comes in. At one point, however, one of Debra's black socks can be seen on the couch in the middle, and in the next shot, the sock has been removed.