Thank you, Dimitri! I'll fix it with next release.
Quick fix:
Open phpMyAdmin, select your Joomla's database and execute next SQL-query:
ALTER TABLE `jos_jcomments` CHANGE `isgood` `isgood` SMALLINT(5) NOT NULL DEFAULT '0';
ALTER TABLE `jos_jcomments` CHANGE `ispoor` `ispoor` SMALLINT(5) NOT NULL DEFAULT '0';