As a few users in this thread experienced that WPF can stop working after installing VS 2008. You might see a message such as:

    MissingMethodException was unhandled    

    Method not found: 'System.Guid MS.Utility.EventTrace.GuidFromId(MS.Utility.EventTraceGuidId)'.

Or:

    Method not found: 'MS.Internal.ContentType    

System.Windows.Navigation.BaseUriHelper.GetContentType(System.Net.WebResponse)'.

You will experience Expression Blend or any other WPF application ceasing to launch. I found this behavior on two of my Vista machines after installing the latest VS 2008 Beta 2 bits and removing Orcas Beta 1. If I had read the "Readme" (yes, sometimes we *should* read them), I would have read that you should remove a couple of Hot Fixes prior to installing VS 2008 Beta 2.

Steps to resolve:

1. Uninstall (from Programs / Features):
• Hotfix for Microsoft Windows (KB110806)
• Hotfix for Microsoft Windows (KB930264)
• Hotfix for Microsoft Windows (KB929300)
2. Restart
3. From the VS2008 Beta 2 CD / Image, install Hotfix for Microsoft Windows (KB110806) one of:
• wcu\dotNetFramework\dotNetMSP\x64\NetFX2.0-KB110806-v6000-x64.msu
• wcu\dotNetFramework\dotNetMSP\x86\NetFX2.0-KB110806-v6000-x86.msu
4. From the VS2008 Beta 2 CD / Image install Hotfix for Microsoft Windows (KB929300) one of:
• wcu\dotNetFramework\dotNetMSP\x64\NetFX3.0-KB929300-v6000-x64.msu
• wcu\dotNetFramework\dotNetMSP\x86\NetFX3.0-KB929300-v6000-x86.msu
5. Restart