Thread:Project:Support desk/$wgFeedDiffCutoff not working?

MediaWiki 1.16.0 PHP 5.2.15 (cgi-fcgi) MySQL 5.1.53-log

I want to remove the differences display from my wiki's recent changes feed. I added the following to the end of my localsettings.php:

$wgFeedDiffCutoff = 0;

However, there is no change in the display. No matter what number I set it to, it always seems to display exactly the same. You can see it here: http://markedrp.com/w/index.php?title=Special:RecentChanges&feed=atom

Any ideas?