[quote user="Martin"][quote user="Benanov"] I know there's a "default .NET version" for ASP.NET...maybe that was set to 2.0?Mine is set at 1.1.4322[/quote]You can control the version of .net that will be used within IIS for the server side, but I am not aware of any client side configuration that will control the CLR used by IE.[/quote]<font face="tahoma,arial,helvetica,sans-serif">I believe you can also set the .NET version to be used on each site in IIS.And yeah, I think the client should really have no permission in enforcing the version the server would use. It's like buying a burger and commanding the fry cook on how he will prepare the burger to suit your needs. (Well you could still do this in real life, so I wonder if....)</font>