Error: Only Content controls are allowed directly in a content page | Thursday, 25 February 2010

I recently came across the following error which happened during a full content deployment, and despite the fact that the template in question was ghosted:

An error occurred during the processing of . Only Content controls are allowed directly in a content page that contains Content controls. 

It turns out (rather randomly) that this can be caused when a lowercase is used for the asp:content user controls in the template. The fix is to modify these to use an uppercase as follows asp:Content.