Thank you for using our services.
The ScriptManager is automatically injected on built in templates and templates created with the template designer within Sitefinity 4.0. If you are using master pages for base of your templates you need to add the ScriptManager control in the markup.
If you create a template which is not based on a master page or use a built in template and add a control which requires script manager you should not have problems.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items