Error en IExplorer 10 "An unhandled exception occurred in the silverlight application sharepoint 2010"

Error que se me generaba cuando intentaba crear nuevos sitios o librerías era el de "An unhandled exception occurred in the silverlight application sharepoint 2010"

Solución:

1. Open Central Administration
2. Select Application Management Select
3. Manage Web Applications
4. Select the Web Application where the error occurs
5. In the ribbon, select General Settings
6. In the Web Application General Settings dialog box, find Web Page Security Validation and select On