In the episode where George causes that whole double-dip scandal at some funeral reception, there was ... a goof.
When George was speaking with the guy while he stocked up on sandwiches, George took a bite from one, but in the next shot, it was whole, and he took a bite again.
Here are two observations from the episode when Jerry gets a new couch:
Jerry spilled water all over himself from Kramer's glass while yelling, "POPPY PEED ON MY SOFA!" He had water all over his face and was slightly spitting, but he didn't care. Best take they could have used (seriously!).
Also, did you notice that, the second time the movers were in Jerry's apartment, he didn't offer them a drink? What kind of a person is he?
"I don't know ..."
-DK