Corrected entry: Chandler and Ross go back to the reception site to take pictures with disposable cameras to "replace" the cameras they had misplaced. Chandler is posing, smiling, etc. In the previous season, Chandler and Monica are getting their engagement picture taken and Chandler can't smile for the camera. In fact, Monica ends up taking her picture with Joey and puts that in the paper.
Corrected entry: At the end of the episode, when Ross finds the red sweater, he says that he has been looking for it for a month. If he could not find it after his night with Rachel then he would at least know it was in her apartment and not need to look for it. If he really had been looking for a month then the sweater meant enough to him that he surely would have asked where it had been found.