Been using CB with much pleasure, find it a great addition. Lately came across this, wonder if anyone has an explanation.
With Error logging in Joomla set to high by $mosConfig_error_reporting = '2047'; in configuration.php, I get the following errors related to CBAuthorbot:
Notice: Undefined property: created_by in /usr/local/www/joomla/mambots/content/CBAuthorBot.php on line 55
Notice: Undefined property: created_by_alias in /usr/local/www/joomla/mambots/content/CBAuthorBot.php on line 57
Notice: Undefined property: author in /usr/local/www/joomla/mambots/content/CBAuthorBot.php on line 57