In /sapphire/core/model/SiteTree.php you can find the following code in function getCMSFields():

foreach($links as $link) {
	$backlinks[] = "<li><a class=\"cmsEditlink\" href=\"admin/show/$link->ID\">" .
		$link->Breadcrumbs(null,true) . "</a></li>";
}

This does not work correctly, as I get something like this:

The following pages link to this page:<ul><li><a class="cmsEditlink" href="admin/show/7"></a></li></ul>

As you can see, the link text is empty. If I change "Breadcrumbs(null,true)" to "Breadcrumbs($unlinked = true)", it works.

Maybe you should change this...

The PHP version I am using:

$ php -version
PHP 5.2.0-8+etch11 (cli) (built: May 10 2008 10:46:24) 
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2006 Zend Technologies
    with eAccelerator v0.9.5.3, Copyright (c) 2004-2006 eAccelerator, by eAccelerator
    with Suhosin v0.9.12, (C) Copyright 2006, by Hardened-PHP Project

Hey tiwoc,

Thanks for the find! Could you submit this bug (and the fix) On open.silverstripe.com - information about submitting patchs on there as well. Then when someone goes through all the tickets to merge them back into trunk then it will be included.

Done:
http://open.silverstripe.com/ticket/2623