When Ezra looks through the DVDs that Aria rented, he says that she got "all five seasons of Big Love". This is impossible since season five of Big Love was still being aired at the time and is still not available on DVD.
In this episode when Aria and Ezra are speaking in the hallway they see Ella. This is reused footage from when Aria and Ezra had their museum date. You can see this because you can see the envelope that Hanna gave her in her hand and Hanna in the background.