The message from "The3rd Earl Of Derby" contains these words:
I spent ages getting the track for the sliding cupboard doors in our bedroom just right. Fitted the doors, left them neatly closed and went downstairs.
Came back up - doors open. Odd. Shut them again and went to do something else.
Came back - doors open.
Checked level - yup, still level. Checked top runner to make sure there wasn't some odd slanting push making them open - dead level.
Went downstairs to get a cup of coffee, came back up - doors open again. Sat on the edge of the bed with the coffee to watch the doors. After about five minutes one of the cats shouldered the door out of the way and went to settle down in the back of the cupboard - which happens to back onto the airing cupboard and is slightly warm. Little bugger, I could have throttled it.