When Winger reprimands Leonard in the hallway at about 3 minutes in, an extra, a man wearing a burgundy sweater vest over a light blue shirt is walking away far behind Winger in the distance, in what appears to be the library. In the next shot he re-enters the scene behind Leonard, in front of Winger, which would have him retracing his previous path moments later.
When Jeff calls Alan to tell him the documents have been shredded, Alan is talking on a desk phone with a cord. Moments later, when the bellhop asks him to leave the concierge desk he is suddenly using a cell phone.
In the first scene, Alan Connor notes that it is sad that Jeff hung his bachelor's degree on the wall. The document clearly reads (just as it did in Season 4) that the diploma is an "Associate in Education" degree.