I'm not stressed, just annoyed. I've had about six hours use out of my car since getting it back -- that's after about 7 weeks off the road -- and now there is the possibility of another problem. I'd kill for, oh, say a month of hassle free motoring.
Re: cold start pressure, I didn't notice and I haven't had time to check today. Either way its going to pay Dr Nathan a visit on Monday. Fingers crossed it just the sender (which seems very common from what I have read).