Has this module been tested on SilverStripe v2.4.2?
I had to make two changes to get it working:
1. in \blog\code\TrackBackDecorator.php line 4 change "function extraDBFields()" to "function extraStatics()"
2. in \blog\code\BlogHolder.php line 163 comment out "Database::alteration_message("Blog page created","created");"