MySQL-error when publishing new revision

After upgrading to beta6 and later beta7 I'm getting this error in watchdog (and just an error-page after clicking "publish this"). After disabling revisioning scheduler I can publish as usual.

PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'Array' in 'where clause': DELETE FROM {revisioning_scheduler} WHERE (Array IS NULL ) ; Array ( ) in _revisioning_scheduler_check() (line 165 in /xxxxx/sites/all/modules/revisioning/revisioning_scheduler/revisioning_scheduler.module).

revisioning_scheduler table exists in database but contains no rows.

MySQL Client API version: 5.1.56

Any idea? Is it just me?