As of the end of Season 2, Anders' apartment has a blue wall around the fish tank; however, during Season 3, the wall suddenly has a dark wood finish around the fish tank. There are also a number of other changes to the decor of Anders' apartment, despite no time having passed between the end of Season 2 and the beginning of Season 3.
At the end of Season 2, Axl drove a silver four-door hatchback to Gaia's goddess ceremony; however, when driving home from the ceremony, he is suddenly driving a completely different car (a black or dark blue station wagon), even though the episode takes place immediately after the end of Season 2.
During season 2, the walls of Axl's flat are orange. However, as of this episode, the walls of Axl's flat are now dark blue, along with a number of other decor changes, despite the fact that S3 starts immediately after the end of S2.
When Dawn has a flashback in Ty's place about being stuck in the freezer, the inside of the door has the patch on it that Ty put over the hole from the chisel Eva stuck in it AFTER Dawn was released and Eva was dead.