.NET Framework 3.5 SP1 issue on Windows SharePoint Services v2.0
In case you have installed .Net Framework 3.5 SP1 on a machine which hosts Windows SharePoint Services v2.0 website running on .Net Framework 2.0, you will notice the following problems. Windows SharePoint Services v3 is not affected by the update.
Symptoms
If .NET Framework 3.5 SP 1 is installed on Windows SharePoint Services v2.0 the symptoms are:
Each web part will display the following error:
Web Part Error: A Web Part or Web Form Control on this Web Part Page cannot be displayed or imported because it is not registered on this site as safe.
Also, the following NT Events are reported:
NT Event Viewer Application Log displays multiple error warnings:
Event ID: 1000
Error initializing Safe control - Assembly: Microsoft.SharePoint, Version=11.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c TypeName: * Namespace: Microsoft.SharePoint.SoapServer Error: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Workaround:
Workaround: Uninstall In Add/Remove Programs remove Microsoft .NET Framework 3.5 SP 1 and Microsoft .NET Framework 3.0 and uninstall Microsoft .NET Framework 2.0. Then reinstall .NET Framework 2.0 Service Pack 1 http://www.microsoft.com/downloads/details.aspx?FamilyID=79bc3b77-e02c-4ad3-aacf-a7633f706ba5&DisplayLang=en.
At the time of writing Microsoft is investigating this issue but there is no timeframe for a resolution. If you need further assistance with this please contact Microsoft support. http://support.microsoft.com
Jie Li
Technical Product Manager, SharePoint
