We released TargetProcess 2.18.2 today with several fixes and cute pics  in Kanban board: visual bugs and tasks count for user stories.

This is not an ultimate health diagnostic utility for user stories, but it's at least possible to see right away how many bugs and tasks are wrapped in in it.

If you have any better images for "bugs" and "tasks" :), you're welcome to submit your comments to TargetProcess UX Group:

http://groups.google.com/group/uxtargetprocess