Visual Studio 2008 Service Pack 1 and .NET Framework 3.5 Service Pack 1
In case you missed we just shipped both SP1 for VS 2008 and SP1 for the .Net Framework 3.5: https://msdn.microsoft.com/en-us/vstudio/products/cc533447.aspx
Visual Studio 2008 Service Pack 1 release notes and a list of fixed issues
What's New in the .NET Framework Version 3.5 SP1
Time to update your development machines.