I'm running 3.2. When my blog is hit I get two errors in my error log:

PHP Notice: Undefined index: PluginSwitch in /var/www/cgi-bin/mt/php/mt.php on line 180, referer: http://www.tbotcotw.com/

PHP Notice: Undefined index: SchemaVersion in /var/www/cgi-bin/mt/php/mt.php on line 180, referer: http://www.tbotcotw.com/

Not a big deal, but it's filling my log with bogus errors.