Drupal 7 : Saving Views prints machine code

This is something thats happened a couple of times to me on different projects; so I though I'd document it.

On saving a view I was getting a page of output that started with  

[{"command":"settings","settings":{"basePath”:  

The issue here is with JQuery.  So take a look at what JQuery is being used or install the 'JQuery Update' module.