Widgets problems

My widgets are stuck and I downloaded widgets reset they are still canno open them. I change themes, deactivate all plugins and activated another theme and I get this message. Warning: array_key_exists() [function.array-key-exists]: The second argument should be either an array or an object in /home/bah/bahbah/bahbah/wp-includes/widgets.php on line 852

This is whats on that line 852:
if ( empty($wp_registered_sidebars[$index]) || !array_key_exists($index, $sidebars_widgets) || !is_array($sidebars_widgets[$index]) || empty($sidebars_widgets[$index]) )
return false;

I posted this in another post that was already solved and was a different problem.