This only works for people who use only stubs to access their blogs.

In /admin/_menutop.php find:

<div id="headfunctions">
	<?php echo T_('Style:') ?>
	<a href="#" onclick="setActiveStyleSheet('Variation'); return false;" title="Variation (Default)">V</a>&middot;<a href="#" onclick="setActiveStyleSheet('Desert'); return false;" title="Desert">D</a>&middot;<a href="#" onclick="setActiveStyleSheet('Legacy'); return false;" title="Legacy">L</a><?php if( is_file( dirname(__FILE__).'/custom.css' ) ) { ?>&middot;<a href="#" onclick="setActiveStyleSheet('Custom'); return false;" title="Custom">C</a><?php } ?>
	&bull;
	<a href="<?php echo $htsrv_url ?>/login.php?action=logout"><?php echo T_('Logout') ?></a>
	&bull;
	<a href="<?php echo $baseurl ?>"><?php echo T_('Exit to blogs') ?> <img src="img/close.gif" width="14" height="14" class="top" alt="" title="<?php echo T_('Exit to blogs') ?>" /></a><br />
</div>

and change it to:

<?php 
// get the stub name for the active blog, if there is one
if( $blog != '' )
	{
	$blogstub = getblogstub( $blog );
	$blogstub = $baseurl."/".$blogstub;
	} else {
	// if there is no active blog then pick the default blog
	$blogstub = getblogstub( 2 );
	$blogstub = $baseurl."/".$blogstub;
	}
?>
<div id="headfunctions">
	<?php echo T_('Style:') ?>
	<a href="#" onclick="setActiveStyleSheet('Variation'); return false;" title="Variation (Default)">V</a>&middot;<a href="#" onclick="setActiveStyleSheet('Desert'); return false;" title="Desert">D</a>&middot;<a href="#" onclick="setActiveStyleSheet('Legacy'); return false;" title="Legacy">L</a><?php if( is_file( dirname(__FILE__).'/custom.css' ) ) { ?>&middot;<a href="#" onclick="setActiveStyleSheet('Custom'); return false;" title="Custom">C</a><?php } ?>
	&bull;
	<a href="<?php echo $htsrv_url ?>/login.php?action=logout"><?php echo T_('Logout') ?></a>
	&bull;
	<a href="<?php echo $blogstub ?>"><?php echo T_('Exit to Active Blog') ?> <img src="img/close.gif" width="14" height="14" class="top" alt="" title="<?php echo T_('Exit to Active Blog') ?>" /></a><br />
</div>

The function "getblogstub()" looks like this:

function getblogstub( $whichstub )
	{
	global $DB, $tableblogs;
	// get the blog stub name based on blog ID
	$query = "SELECT blog_stub FROM $tableblogs WHERE blog_ID = $whichstub";
	$blogstub = $DB->get_var( $query );
	return $blogstub;
	}

If this was a good hack it would look at blog access method and generate an appropriate link, but it's not. :roll: