I sometimes get this error while saving, seems to happen only with runes.
Seems to be an error saving the attributes of the item. After that, if the server is closed and re opened, the player loses those runes, because they couldn't save, so it's actually a problem.
MySQL ERROR mysql_real_query: INSERT INTO `player_items` (`player_id`, `pid`, `sid`, `itemtype`, `count`, `attributes` ) VALUES (4,109,118,2273,10,' n\') You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' n\')' at line 1
Seems to be an error saving the attributes of the item. After that, if the server is closed and re opened, the player loses those runes, because they couldn't save, so it's actually a problem.