Microsoft .NET Framework 3.0 Release Notes

http://msdn2.microsoft.com/en-us/win.../bb188202.aspx
Microsoft .NET Framework 3.0 Release Notes

Contents
1. System Requirements for Installing .NET Framework 3.0
2. .NET Framework 3.0: Installation Known Issues
3. Troubleshooting Steps for Download Errors
4. Windows Communication Foundation Known Issues
5. Windows Workflow Foundation Known Issues
6. Windows Presentation Foundation Known Issues

Note For best results, install on a computer that has not had any
pre-release versions of .NET Framework 3.0 installed on it. If your computer
has a pre-release version on it, you must remove it in the correct order to
ensure a clean uninstall. Follow these Uninstall Instructions to uninstall
the pre-release bits before installing this build. Please also reference
section 2.8 of this page for additional information about system with
pre-release versions of the Framework.