I'd try adding:
Code
	if($style_array['general'] == "") { $style_array['general'] = "default"; } else { }

Above:
Code
	$avatar = "{$config['FULL_URL']}/images/{$style_array['general']}/nopicture.gif";

So that if the portion of the array is blank it'll be changed to default, versus always setting it to default.

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