Component fails to write to Head section inside Panel
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                 Key: WICKET-2725
                 URL: https://issues.apache.org/jira/browse/WICKET-2725
             Project: Wicket
          Issue Type: Bug
          Components: wicket
    Affects Versions: 1.4.5
            Reporter: bernard


I use panels to enclose <head> and <body> so I can replace content of a page on 
this level.

I do this to 
a) take advantage of the panel replacement feature that lets the URL unchanged 
(eliminates back button problems)
b) use different heads, bodies, scripts and styles per panel
c) make editing panel HTML requiring external scripts as easy as editing page 
HTML.

When doing so, AJAX stops working with the following error:

"You probably forgot to add a <body> or <header> tag to your markup since no 
Header Container was 
found but components were found which want to write to the <head> section.
... "

I am really stuck with this because I have already converted quite a few pages 
to this pattern.
The panels are not re-usable components. They are really more like pages that 
are replaced with the objective of having them all opened with the same URL.

I think that this is a really simple use case and therefore I am thinking that 
there might be an alternative implementation achieving the same results. 
However I still think that this implementation should work.


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