Detected bug in an extension! Hook FCKeditor_MediaWiki

[Damian Stalls]

I am receiving the the following error on a fresh install of Media Wiki 1.15.5 andFCKeditor 2.6.6. This error was triggered while trying to create a new page.

Internal error
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Detected bug in an extension! Hook FCKeditor_MediaWiki::onCustomEditor failed to return a value; should return true to continue hook processing or false to abort.

Backtrace:

#0 C:\wamp\www\includes\Wiki.php(502): wfRunHooks('CustomEditor', Array)
#1 C:\wamp\www\includes\Wiki.php(63): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#2 C:\wamp\www\index.php(116): MediaWiki->initialize(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#3 {main}

Retrieved from "http://localhost/index.php/Superman"