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Error on top of All Pages…Help.

  • I recently installed an author link plug in…after doing so an error message appeared at the top of all my pages…it looks like this:

    Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘addHeaderCode’ was given in /home1/conteste/public_html/wp-includes/plugin.php on line 339

    Can anyone provide some help with correcting the problem? I deactivated the plug-in.

    Many Thanks!

    Chris

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