DreamWorks removed posters for the upcoming Robert Redford movie "The Last Castle" that showed an American flag flying upside down.

CNN: Fall movies undergo changes

Last December, the council voted to restrict the flying of the Union flag over city hall to designated dates.

BBC: Queen Victoria and union flag

They began last Monday night when Belfast City Council voted to change its policy of permanently flying the union flag at Belfast City Hall.

BBC: Flag violence is 'damaging' Belfast's trade and tourism