When Dwight and Michael drive to his condo, the digital clock in the car says 11:11. When they drive back to the office after signing the papers, the clock says 10:20. It's still light out and the office is still open so it should be somewhere between noon and five.
In the scene where Jim lights the candle and hums the Olympic theme, the camera pans too far to the right and one of the cameramen is clearly visible. However, given the "mockumentary" style, it is acceptable for cameramen to be in the room.
When Dwight is removing the clamps to the convertible top. Michael says it is 50 degrees out. You can see on the dash that it says 74 degrees.
When Jim approaches Stanley asking him about any games he knows to play around the office, the audio is visibly off as Jim's mouth doesn't move when the audio plays.
John Krasinski (Jim Halpert) is telling them the yogurt metal lid colors for which they will be competing during the 1st office "Olympiad". At 12:21 mins (9:10 on the DVD), you can hear him voice over "...gold, silver, and bronze yogurt lids."