As the project I am working nears completion, attention is drawn to reporting.  In my scenario, I want all logging to be sent to the database and only warning+ to be logged to the event log.  No problem, as the reporting is based on Enterprise Library 4.0, this is just configuration.

Unfortunately there is a defect in 3.0 and 4.0 where the Filter on the FormattedEventLogTraceListener does not influence the logging.  Fortunately, using the System.Diagnostics.EventLogTraceListener works a treat.

http://www.codeplex.com/entlib/Thread/View.aspx?ThreadId=30645

This appears to be fixed in Enterprise Library 4.1, but I have not confirmed this yet.