[cssmoo]

I think you're right. It's not coincidental that after Mr Postman delivered it and I set it up, I immediately went and had lunch in McDonalds.

It appears that it doesn't understand that I could possibly work from home and went to lunch that one day and its heuristics are broken in some way.

I've turned it off now and I'm happy (plus I get another hour or so out of the battery)

[fweep]

If you ever want to use it again, you -should- be able to manually set your work locations in the Now settings. Theoretically. At least, that worked for me.