Wikimedia Bugzilla is closed!

In the call to showChunk from showTopLevel four parameters are passed but showChunk only takes 
three - and extra false is included which means that the $including flag is not passed correctly 
and when Special:Allpages is included and there are only a small number of pages it shows the 
navigation form when it shouldn't.

Suggested fix - remove the false in the call to showChunk below

	// If there are only two or less sections, don't even display them.
	// Instead, display the first section directly.
	if( count( $lines ) <= 2 ) {
		$this->showChunk( $namespace, '', false, $including );
		return;
	}