I am using Alfresco 2.1RC1 and i have this situation:
There are 3 users, ex: joe, mary and alex.
"joe" assigned an adhoc-task to alex
"alex" is now the owner of the task
"mary" accessed the task by "All Active Tasks" in "My Alfresco" and completed the task
the task returned to "joe" with the assignee "alex"
Conclusion: I don't think this is right, "mary" shouldn't have the permission to complete the task.
is it a bug?