Has anyone solved this problem?

I have read lots of threads from people with the same problem and lots of advice on how to find a current drain, but no-one seems to come back and say if or how they fixed the problem.

For anyone who has not read these threads we are having trouble with the battery discharging overnight. We have had a new alternator and a new battery but problem remains.

The local auto-electician says there is no drain but still the battery is flat every morning.