Bump version number. If you're already running the grabber, execute the following in mysql:

 CREATE TABLE `SDimageCache` (
  `row` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `item` varchar(128) NOT NULL,
  `md5` char(22) NOT NULL,
  `dimension` varchar(128) NOT NULL,
  `type` char(1) NOT NULL,
  PRIMARY KEY (`row`),
  UNIQUE KEY `id` (`item`,`dimension`),
  KEY `type` (`type`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8