Originally Posted by arjey
Another note - another way to kill pending tasks on a user is to move them to another server.. If anyone else has any other way of performing this - besides running a query against the database, let me know!
Incidentally you don't need to have a second server. Select user, select Switch BlackBery user to different server, existing server is only option, select yes to switch user and cause all tasks to fail.
Worked for me!