The new service pack for Visual Studio .NET 2003 is available for download here. If you are not upgrading to Visual Studio 2005 (why not?) you may want to have your IT people (or you if you are the IT people as many teachers are) look at installing the service pack for Visual Studio 2003.
It’s actually pretty impressive that a product goes this long without a service pack. This one incorperates a lot of fixes, mostly minor or impacting few people, that have accumlated over time. There has been extensive testing on this service pack so it too should be pretty solid. So if you have occasionally run into a little problem (or especially if you frequently run into problems) with Visual Studio .NET 2003 get the service pack.
Oh and if you want to see the list of issues that were fixed they can be found here.