Thread:Project:Support desk/Error when trying to lockdown permissions after upgrade

So, I recently upgraded from Mediawiki 1.16.4 to Mediawiki 1.18.2... The wiki was previously set up so most pages could not be viewed or edited by a select few users.

If I login, everything seems to work fine. However, if I'm not logged in and click on a page I don't have permission to view, I get an ugly error message, and setting $wgShowExceptionDetails = true; only makes it uglier without being helpful. I used to get a helpful "You don't have permission" page from Mediawiki.

The wiki is at http://writers.threadsofdamocles.org/ ... If you want to see the ugly error message, try http://writers.threadsofdamocles.org/index.php?title=Plotlines

MediaWiki 	1.18.2 (updated from 1.16.4) PHP 	5.2.17 (cgi-fcgi) MySQL 	5.1.53-log

This is what's in the LocalSettings.php

This is the error message, in case you don't want to click on the URL above:

Any idea what's going on here?