Cheers Alan,
Hope you are having a good Christmas.
I certainly don't envy your task of keeping the database up to date. I use Aviation Letter to update my database and there are literally thousands of changes every month between aircraft being sold, wfu, newly delivered, etc. I then cross check the ownerships of bizjets that come on the RB with the information given in Airframes. It's amazing the difference you can get if there are several operators using the same name but with subtle differences such as a hyphen or space in the title such as in the Winair example above.
Anyway, hopefully you and the rest of the updaters won't get too stressed out and continue doing this good job in 2011.
Ian