In both Brussels airport and the Liège railway station, we hear a Dutch voice with a Hollandic accent (Dutch as spoken in The Netherlands) speaking through the PA. This doesn't make sense as in Liège the language would be French, and in the airport, Dutch announcements would be with a Belgian accent (Flemish).
After Manning is busted and communications between Assange and Domscheid-Berg are cut, Marcus chats with Assange. Then Domscheid-Berg uses Marcus's laptop to chat to Assange. The chat somehow recognizes the change in typing person, reflecting this in stating that the message came from "ddd" / Domscheid-Berg.
During a scene in London where Julian is inside a taxi, we see a blonde women with a ponytail approaching the taxi. However on the next shot showing Julian inside, her hair is now visibly showing wavy hair instead of a ponytail.