When the Odyssey exits hyperspace, the bridge pod is on the top right side of the ship. When it comes through the clouds a minute later the bridge pod appears on the top left side of the ship.
At about 15 minutes, when Teal'c is communicating with the Odyssey while it is near the black hole, Teal'c's voice is lower pitched, supposedly by the time dilation, but the communication back to Teal'c from the Odyssey is also lower pitched and slowed. Because Teal'c is not near the black hole and not affected by the time dilation, his voice received at the Odyssey should be sped up when received, and only then affected by the time dilation in reverse.
When Col. Carter is briefing the Atlantis team members regarding the Ori threat in the Milky Way, she says the threat was "here", which is impossible, as the Ori were unaware the Pegasus Galaxy was inhabited, so therefore had no interest in the Pegasus Galaxy.
SG-1 intends to connect a stargate in the Pegasus Galaxy with the Ori supergate in the Milky Way, which they do. They leave it active to keep the Ori from using the supergate to invade. However, this would allow the Wraith to reach the Milky Way, though not in Cruisers or Hive ships. On Stargate Atlantis extreme measures, including destroying the city, were to be used to keep the Wraith from finding Earth, which would be much easier with a permanent gateway into the Milky Way.
While talking to the Ganos Lal "hologram," Dr Jackson says he thought he had her as a teacher in "Grade 5." In the US, it is more typically described as "Fifth Grade."