Form submit function called but strange db_query behavior

I have a form that is generated through an AJAX request. When the form is submitted the correct function is hooked. The values are passed to that function. But when db_query using UPDATE SQL in that function is called, it acts like it works but the data in the database is not updated. Probably something simple I'm missing, but I'm not seeing it.

function docs_edit_folder_form( $form_state, $folder ) {	
	$form['title'] = array(
		'#type' => 'textfield',
		'#title' => 'Title',
		'#description' => 'The human readable descriptive title.',
		'#size' => 40,
		'#max_length' => 50,
		'#value' => $folder->title
	);

	$form['description'] = array(
		'#type' => 'textarea',
		'#title' => 'Description',
		'#description' => 'Any additional information about the folder can be added here.',
		'#cols' => 40,
		'#value' => $folder->description
	);
	
	$form['id'] = array(
		'#type' => 'hidden',
		'#value' => $folder->id
	);
	
	$form['submit'] = array(
		'#type' => 'submit',
		'#value' => t( 'Save' )
	);

	return $form;
}

function docs_edit_folder_form_submit( $form, &$form_state ) {
	db_query( "UPDATE {docs} SET title = '%s', description = '%s' WHERE id = '%d'", $form_state['values']['title'], $form_state['values']['description'], $form_state['values']['id'] );
	
	if ( db_affected_rows() > 0 ) {
		print( $form_state['values']['title'] );
	}
	else {
		print( 'Oops' );
	}
}