When they are driving in the red car along the highway, just before he says "you're beautiful, beautiful baby", you can see where it was edited as the image jumps very slightly. The audio visual is then very slightly out of sync as he says those words.
When Linda takes the phone call from her publisher in her kitchen confirming they believe her, before the publication of "Ordeal", she replaces the phone handset back onto the wall cradle with her right hand. When the camera views her explaining the call to her husband, from a different angle, she's holding the handset with her left hand.
The recreations of scenes from Deep Throat (1972) often do not match the original film. For example, Harry addresses Linda as "Mrs Lovelace" (in the original she is an unmarried "Miss"); and Linda delivering her line about "Bells ringing" while Dolly is sitting on the kitchen bench is a conflation of different scenes in the original.
In the soundtrack credits, "Rock Your Baby" is listed as performed by K.C. and the Sunshine Band. The performer was actually George McCrea.
In a scene set in 1970, two characters discuss The French Connection (1971), which was released in 1971.
During one party scene set in 1970, Elvin Bishop's "Fooled Around And Fell In Love" plays on the radio. The song was released in 1976.
When the door is opened at hotel after the beach scene, the door handle has a magnetic key card slot, specifically a Ving Card 980 not released until the mid-to-late 1990s.
An establishing shot of New York, before we go into Lovelace's audition, shows contemporary automobiles as opposed to the ones from 1970.
When Lovelace drives in her red Cadillac and is being filmed by the crew, a portion of the camera car is momentarily reflected on it.