What would cause contextual filter settings NOT to save? I have a view in Drupal using a contextual filter.  I save the changes about what to do when a value is passed.  After I hit save, everything revers back as if nothing ever happened.  

Has anyone seen this before? Any suggestions?
In the end, the "simple" answer worked. I deleted the filter and added it back.  I'm not sure if I configured it wrong to begin with or if something "bigger" was at play.