When I open the NCrunch Processing Queue window, it is to find out what NCrunch is currently doing. To reduce clutter, I only show the pending and currently processing tasks.
However, I just had a case where a build assembly failed, which wasn't shown. I was wondering why NCrunch simply stopped. I found out that this failed task is only displayed when the completed tasks are shown. As far as I am concerned, this is a bug (the check mark icon suggests to me that it shows successfully completed tasks), and any failed tasks should either be always shown, or there should be a separate toggle for failed tasks.