Continuity mistake: When Bulldog gets back to the kitchen table after closing the door on Roz's date Ted, there is a large blue casserole dish sitting there - it wasn't there when he went to answer the door. Roz had been hiding the whole time, so she didn't put it there.
Continuity mistake: Roz and Bulldog are sitting on her couch, talking about Baby Alice. Roz has her arms folded in front of her, but in the next shot she is leaning back with her arm behind her and her hand on the couch. The change in shot also shows a change in the position of the toys on the coffee table in front of them. The Tigger puppet goes from one side of the table to the other and the little teddy turns around 180 degrees.
Continuity mistake: When Roz's date Ted returns her purse to her apartment, Bulldog answers the door. He barks at Ted and Ted nervously drops the purse. We see Bulldog close the door. He should have picked up the purse first, or he wouldn't have been able to close it. We do see him drop the purse in a chair as he heads to the kitchen, but we never actually see him pick it up.
Continuity mistake: During the opening credits Roz and Frasier are sitting on his couch working. Roz is telling him that she has a date the next day - he is holding a magazine. But as she says "a month", the shot goes back to Frasier and he's holding papers rather than the magazine.