Fight Face - S6-E2
Visible crew/equipment: After TJ has put up the three wood shelves at the diner, when he tells Luke that the top shelf is an engagement gift just as he walks around the counter, the white T-mark is visible on the floor where TJ had been standing. (00:05:45)
Fight Face - S6-E2
Visible crew/equipment: When George, the architect, starts walking out of the diner, the T-mark (looks like chalk) is visible on the floor beside Luke's chair. (00:28:45)
Visible crew/equipment: After Paris leaves the inn, when Lorelai goes into the kitchen and teases Michel and Sookie for hiding, the T-mark is visible at Lorelai's feet. (00:09:20)
Visible crew/equipment: When Paris calls Rory while she's at the DAR office with Emily, in the shot of Paris as she walks away from the coffee cart toward the bench, a yellow tape mark is visible on the ground in front of the bench where Paris will sit. (00:13:40)
Visible crew/equipment: After TJ gives Tom the "special" hammer, when TJ walks over to Rory's bedroom door the white T-mark is visible on the floor under the table. (00:17:15)
Visible crew/equipment: At the DAR event, after Emily finally tells off Mrs. Huntzberger, when Emily takes her seat the white T-mark is visible on the floor near her chair. (00:42:20)
Visible crew/equipment: As Richard and Mitchum have their heated discussion in the bathroom, there is a mic seen through the whole scene in the top right corner that moves as the camera moves.
Welcome to the Dollhouse - S6-E6
Visible crew/equipment: When Lorelei calls Taylor and she's on the bed with Paul you can hear someone from the crew snap at the dog to get his attention.
Twenty-One Is the Loneliest Number - S6-E7
Visible crew/equipment: While Lorelai is adding whip cream to her pancakes, when Luke answers the phone call from Rory, the T-mark is visible on the floor behind the counter. (00:26:40)
Let Me Hear Your Balalaikas Ringing Out - S6-E8
Visible crew/equipment: When Rory is trying to get a very drunk Logan into her car, the boom pole and mic are reflected on the car's windshield. (00:16:05)
The Prodigal Daughter Returns - S6-E9
Visible crew/equipment: Right after the opening sequence, in the shot of Emily reading the newspaper at the table, the T-mark is visible on the floor beside the door. (00:04:50)
The Prodigal Daughter Returns - S6-E9
Visible crew/equipment: When Rory returns home Lorelai rushes out and they hug, then as the steadycam operator circles them the camera casts a moving shadow on Lorelai and Rory. (00:41:55)
He's Slippin' 'Em Bread... Dig? - S6-E10
Visible crew/equipment: While Lane and her bandmates are at Sophie's music store, two T-marks are visible on the floor. (00:16:50)
He's Slippin' 'Em Bread... Dig? - S6-E10
Visible crew/equipment: After Rory calls Paris to tell her she's going back to Yale, when Lorelai walks into the kitchen and removes her jacket, the red T-mark is visible on the floor behind her chair. (00:23:35)
Visible crew/equipment: When Rory is finally going back to Yale, in the scene where she and Lorelai are standing by the car debating who Paul Anka likes better, Rory gets in the car to drive away, but in the next shot of the car actually driving away, you can see what is a man's arm driving the car. (00:06:50)
Chosen answer: Lorelai and Christopher get married impulsively in Paris but they get divorced shortly after returning home. I don't know the exact number of days or weeks but they definitely weren't married for more than a couple of months.