Problem di Widget

Widget nggak muncul:
Terus selalu ada tulisan di admin dan di web spt ini:

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PHP Error Message

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/a9204383/public_html/wp-includes/widgets.php on line 654

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PHP Error Message

Warning: Invalid argument supplied for foreach() in /home/a9204383/public_html/wp-includes/widgets.php on line 654

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Kenapa tuh ya?

Thx