Factual error: Sizzling Sara is doing her live radio broadcast in front of a rack of magazines. One of the magazines is a Robin comic book. The series of Robin comics that used that logo began in 1993, 14 years after the episode takes place. (00:15:35)
Continuity mistake: When Donna introduces Sarah to the gang, she states that it took her 6 months of sorting records to become 'Hot Donna'. In season 3 episode 14 "Radio Daze" Donna has just started working there and gets the name 'Hot Donna' immediately. (00:01:20)
Answer: It's Ashton Kutcher's dog.