If broken it is, fix it you should : ASP.NET 2.0 Crash case study

Users of ASP.Net 2 may have noticed strange crash logs appearing in their Application Event log. You may be supprised to know that if you migrated from ASP.Net 1.1 you may have been getting the same crashes previously but due to Microsofts previous logging policy the previous crashes just weren't being reported. This article describes methods to track down the ellusive errors that are occuring when nobody is watching.