I actually just ran into a "problem" involving the server roles in SQL Server 2000 (and I believe 2005). We have a VB application used in house, and users have a SQL Server login. Logging in the application uses the user_name() function. Some of our users also belong to server roles. We've found that for those users, user_name() returns "dbo" instead of their user name. Instead, we apparently need to use something like system_user to return their actual user name. This seems stupid really, but apparently is a known issue? It was news to us, and now we need to change a good number of our stored procedures. Bah!