cartalyst/sentry — pull request #47 by arbme (2012-01-21 01:57:07+00:00)
Title: ErrorException [ Error ]: Class 'Sentry\DB' not found

Moved group_exists()->sentry/group.php: ErrorException [ Error ]: Class 'Sentry\DB' not found
PKGPATH/sentry/classes/sentry.php @ line 321 - DB class not loaded

If you add "use DB" you get:
ErrorException [ Error ]: Cannot access protected property Sentry\Sentry_Group::$table
PKGPATH/sentry/classes/sentry.php @ line 322 - Not sure new to static methods but think its because Sentry doesn't extend Sentry_Group.