When Ricky and Larry are leaving to meet Louis, she is wearing an orange-colored shirt under her jacket, but when they're with Louis and Starkman she's wearing a different shirt.
When Ben Affleck is getting ready to get into bed, the digital clock reads 10:28. In the next shot it read 10:27.
Ricki takes her herbal tea bag from her cup, wraps the string around it, and drops it onto her saucer - moments later, it's back in the cup.
After Louis hangs up on Gigli - who questions about Ricki - Gigli still talks on the phone despite Louis hanging up on the other end. However, Gigli is obviously trying to create the illusion that the phone call ended amicably, rather than with Louis angrily hanging up on him.
The cast in the end credits is listed as being "in order of appearance" and Terry Camilleri ("Man in Dryer") is listed before David Backus ("Laundry Customer"). But Backus actually appears on-screen before Camilleri.
Larry says that Gigli "rhymes with really." The correct (Italian) pronunciation is gee-l'yee.