In that case it seems that Fancybox doesn't support the HTML5 Fullscreen API, at least not out of the box.
This link here leads to a Fancybox version that has support for the API.
http://www.aerislab.com/2012/04/fancybox…en-api-support/
May help solve the HTML5 issue, but with Flash, either way it's no go.
The only way I get around it is to set fullscreen to false when onclick and calling the lightbox.
eg
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Quellcode
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1
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onclick="set(fullscreen,false);js(yourfunction);"
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