Visual Studio 2005 SP1 ReleasedService Pack 1 addresses issues that were found through a combination of customers and partner feedback, as well as internal testing. The issues addressed range in severity from places where the syntax coloring was incorrect to customer reported crashes in various scenarios. In some areas, more than 50% of the bugs addressed were reported by customers through the MSDN Product Feedback Center. Overall, Service Pack 1 offers customers improvements in responsiveness, stability and performance for Visual Studio 2005.
Visual Studio 2005 SP1 Update for Windows Vista Beta
For developers using Visual Studio 2005 on Windows Vista, Microsoft released a beta of the Visual Studio 2005 SP1 Update for Windows Vista.. The Visual Studio 2005 SP1 Vista Refresh Beta is still on target to ship in Q1 of 2007, after the consumer availability of Windows Vista.
Go here for the downloads and details:http://msdn.microsoft.com/vstudio/support/vs2005sp1/default.aspx