If I remember correctly, I think the Princess of Norway had bow door problems quite often when she was Spirit of Tasmania.
When she was purchased for the Bass Strait route, she did have to have some modifications to the bow in order to make her better commpatible with the shore landing facilies in Melbourne and Devonport. I think the Ramp was too short, something like that and the doors were modified to open further apart.
Some one did tell me that they did have a tendacy of leaking but the internal door had been also modified to create a better seal.
I am not sure but did she have bow doors as Peter Pan or did she have the lift up nose?