title: What does "Uncaught TypeError: Cannot call method 'shift' of null - all.js:54 mean?
body: <p>My FB canvas app is up and running and working as it should but I'm getting this error in the JS debug console:</p>
  
  <p>"Uncaught TypeError: Cannot call method 'shift' of null"    all.js:54</p>
  
  <p>and I'm wondering if it's a problem with my code or if its because the jdk is always being worked on by the FB team. Should I be worried about it?</p>
  
  <p>Thanks in advance,</p>
  
  <p>Robert</p>