I'm using telerik in a .Net 3.5 solution, but Telerik have started to act strange when I'm debugging. 

Telerik.Web.UI.RadEditor with ID='DocumentHTML' was unable to find an embedded skin with the name 'Sitefinity'. Please, make sure that the skin name is spelled correctly and that you have added a reference to the Telerik.Web.UI.Skins.dll assembly in your project. If you want to use a custom skin, set EnableEmbeddedSkins=false.

But I have a reference in my project. since it won't compile without it, and its in the GAC. 

This is the output from gacutil:

  Telerik.Web.Design, Version=2013.1.417.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4, processorArchitecture=MSIL
              SCHEME: <WINDOWS_INSTALLER>  ID: <MSI>  DESCRIPTION : <Windows Installer>  
  Telerik.Web.UI, Version=2013.1.403.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4, processorArchitecture=MSIL
  Telerik.Web.UI.Skins, Version=2012.3.1016.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4, processorArchitecture=MSIL

Hope you have an idea as whats happening. 
Magnus

Hi,

 Please make sure you are referencing everywhere the same version of the Telerik assemblies. In your case the version of the Skins assembly is 2012.3.1016 and the version of Telerik.Web.UI is 2013.1.403. To avoid any problems the versions should have the same number.

Regards,
Marin
Telerik

Thanks for the help.