Still as puzzled as ever about who opened my door. Then McR told me that his mother thought she had seen an item on something likewise on the local radio-station. Sent them an e-mail and got a reply that they had never done an item on people changing locks on people's doors, would I mind having a radio reporter over?
So this evening I had a radio reporter over, who asked me loads of questions and then took off again. Finally got round to popping by the police station, where I was told that there actually wasn't anything I could file a complaint about. It wasn't break and enter because I couldn't prove that anybody ever entered, and it wasn't a whole lot of other offenses either. In the end after pressing on a bit, the only thing punishable by law was apparently theft of my lock and police lady claimed that even this was a bit of a shady one.
At least with the radio people over I've already had my money's worth of fun. Did I mention that tomorrow morning at 9 am a tv crew will pop by to do an item? Seriously, apparently local tv and radio are dying for items :-)