Just saw two back-to-back episodes on FOX, one was the new one, and one was a repeat that I haven't seen before.
First, my capsule submission for the new episode (Co-Dependent's Day, FABF10).
DYN - Ralph Wiggum picking his nose while waiting in line for Cosmic Wars? - Duffman seems to have lost a bit of weight?
Previous Episode Refs - 9F02 (Lisa the Beauty Queen) - someone singing MacArthur Park (In 9F02, Pahusacheta Nahasapeemapetilon played this song on a tablah during the beauty pagent, and sang it. Homer sang this same song in FABF10.)
Second episode, which was The Fat and the Furriest, EABF19:
Previous Episode Refs - 2F32 ('Round Springfield) - Starland Vocal Band (In 2F32, Homer is shown to have a Starland Vocal Band tattoo, and he exclaims "They suck!", and in EABF19, Lenny and Carl (and later Bart) are singing along with Afternoon Delight, which was Starland Vocal Band's big hit in 1976)
Goofs - There's a yellow fire hydrant in front of The Simpsons house! In 2F22 (Lemon of Troy), Shelbyville is the town with the yellow fire hydrants, and Bart implied that Springfield has red ones. (Perhaps since 1995 they painted them yellow)
I've got others, but since this is a repeat I'm sure they were all mentioned back on 30 Nov 2003, including the two I just mentioned.
Jay