The photo of the pilot loses his shoulder insignia between different shots.
The clinic database refers to a patient with a sleep dissorder. Disorder should be spelt with one S.
A victim's last name is Leiter and the Fringe agents pronounce it as "Leater". While pronunciations of a name may vary, the name Leiter is customarily pronounced as "Lighter" such as the baseball player Al Leiter and is the way google pronounces the name.
Near the end of the episode, the pilot is flying towards a suspension bridge. There are no suspension bridges in Seattle.
When discussing whether Dr. Nayak's server could have been hacked, Agent Broyles says there was "no sign of a DDoS attack". A DDoS (Distributed Denial of Service) attack is not a means of hacking into a server to alter data - it refers to flooding a web site with so many connections, through automated means, that legitimate visitors can't connect to it. It's a mode of attack that has no relevance to the situation they were discussing.
Olivia tells Dr. Nayak that she'll "send a copy" of the note he received to the FBI documents unit, where they will "analyze the handwriting, the paper, and the ink." They wouldn't be able to "analyze" with any precision either the paper or the ink from a copy, physical or electronic.
Olivia states that the two examples of the handwriting come from the same person. They are clearly different, particularly the sloping F that she points out, which does not slope on the list of names.