5 months ago i fitted a new internal door to a bedroom. It was a moulded panel door. I just noticed today that the vertical edge above the latch is now catching the frame as it closes. It was perfect when I fitted it 5 months ago (2mm gap all round). I am posting this because I want to understand why it has changed. I am worried that if i re-trim the door, it may contract and leave a large gap. The door is hung by 3 steel hinges and they still seem solid. any ideas apreciated. Thanks.