Steps to reproduce:

1. create a status
2. call it in a filter, save it
3. change the status name
   RESULT is the filter will no longer work.

It's quite an easy fix, but still, if the system allows you to easily change a status name, it should not cause errors in the filter. It may lead to big mistakes and waste of time. Specially when you guarantee that it is possible to change status and then you find out you'll have to update all them filters that use it. And then, there is no easy way to know which filters were using that status, except going ono by one...you can see the mess I've done.