When the memorabilia dealer's door is broken into, it at first shows the security curtain is at the knee level, but when the kick it in, the security curtain has disappeared.
The photograph of the Dusniak family found in Bernadette's diary is not the one used throughout the rest of the episode. The first photo shows the family against a black studio-type background; the subsequent version shows an outdoor shot, with a different a arrangement. These are treated as the same photograph throughout the episode.