We just upgraded from plug-in version 3.3.0 to 3.3.1, and the Hide Transition Condition stopped working. We transition these hidden transitions by using subtasks with the Transition Parent post function. After upgrading, we see messages in the log like:
2014-07-09 23:57:35,004 http-bio-8080-exec-4124 WARN jrwilson 1437x305182x6 1efhzns 10.128.97.107 /secure/CommentAssignIssue.jspa [jmwe.plugins.functions.TransitionParentIssueFunction] Error while executing function : transition [Passed Testing] not found
The "Passed Testing" transition does in fact exist on the parent, with the hidden condition defined.