Error Handling: top-down or bottom-up approach? - Jan Zelenka & Jon Jeffery 

Very nice. I saw an earlier version of Jan's presentation i a few years ago. This one is really showing that he has deepened his knowledge on the subject even further. A lot of my scripts are crying to be improved by this error handling standards, at least some flavour of them that consistently handles stuff all over the application in the exact same way..