Corrected entry: During Joey's surprise birthday party in her dorm room, she and Dawson start arguing and everyone else suddenly leaves. Right after that, as Joey and Dawson are standing in the room arguing, you can see the shadow of another person on the wall just behind Joey, to the left. The shadow appears to be a boom operator, with a long-handled boom mic, and you can see him moving in and out of the shot by his shadow. Dawson and Joey aren't moving at this point, so neither of them could be causing the shadow. Also, there is equipment shown in shadow as well.
Corrected entry: At the beginning of the episode, the camera pans across the floor of Joey's dorm room to her bed - showing the trail of clothing that apparently came off before she and Dawson were intimate. There is a clear close-up shown of her bra, implying that Joey was wearing street clothes at the time and took them off rapidly to sleep with Dawson. But in the previous episode; Joey had been in pajamas ready for bed when Dawson woke up and gave her the birthday gift, which led to the intimacy. Joey wasn't wearing a bra at that time, just pajamas. And she wouldn't likely have just dumped her street clothes on the floor in a trail leading to her bed before changing into PJs.