Opening Visual Studio 2005 projects in Orcas (2008)
I'd assumed that Visual Studio 2008 would be able to open 2005 projects and manage them alongside any new 2008 projects.
This isn't quite correct - 2008 will upgrade 2005 projects, but those projects can still target the .NET 2.0 runtime. There is a difference!
So if you've got a team project where not everyone is moving to 2008, best keep using 2005 on it.