I followed the instructions on http://confluence.atlassian.com/display/JIRAEXT/Varying+assignable+users+by+transition to get different assignable Users on each transistion. Because no user is allowed to set properties begining with "jira." I decided to to modify the code at ..."jira.issue.assignables"... to ..."jiraext.issue.assignables".... After compiling (with maven) and replacing CommentAssignIssue.class and WorkflowUtil.class I restarted jira. No Errors occoured in log. In a workflow with a transition containing a property "jiraext.issue.assignables" this has no effect on the list of assignable users. Therefore I decided to put some debug output in each method of CommentAssignIssue.java to see which methods are called. Compiled, Replaced, Restarted... getAssignableUsers is never called
Is this a Bug?
Am I doing something wrong?

We do need different assignable users on each transition because of a large Team with many roles and a complex workflow.
Thanks.