Maintenance mode message might be misleading

core/templates/update.user.php

 <ul>
 	<li class='update'>
-		<?php p($l->t('This %s instance is currently being updated, which may take a while.', array($theme->getName()))) ?><br/><br/>
+		<?php p($l->t('This %s instance is currently in maintenance mode, which may take a while.', array($theme->getName()))) ?><br/><br/>
 		<?php p($l->t('This page will refresh itself when the %s instance is available again.', array($theme->getName()))) ?><br/><br/>
 		<?php p($l->t('Contact your system administrator if this message persists or appeared unexpectedly.')) ?><br/><br/>
 		<?php p($l->t('Thank you for your patience.')); ?><br/><br/>