I have upgraded JIRA to version 6.2, and have JIRA Agile at version 6.3.4.
When I drag items on the Kanban board, the items don't move but instead throw javascript exceptions, with the message "
This issue happens on Chrome v32 (and IE8)
This only happens on a special Kanban board that we created, which has 10 columns for different statuses, on the scrum boards we usually use it's fine.
(I found a similar issue to the above, but the similar issue mentions the iDalko Table Grid Editor, which we do not have).