title: Bad Signed JSON signature for a single app
body: <p>I'm working on an application that serves multiple Facebook apps from a single source. It's structured so that multiple apps can be served from multiple machines all running the same code - only the config changes per app.</p>
  
  <p>Running one of these apps on my local machine works fine &amp; running all but this one problematic app on the live server also works.</p>
  
  <p>The scenario causing problems is one app running on the live server that triggers the infinite redirect loop and "Bad Signed JSON signature" spammed in the error log.</p>
  
  <p>Since this is a shared codebase and the other apps all work - the logical place to look is in the config - I've checked 3 times now - the App ID, secret and redirect params are correct.</p>
  
  <p>So - <strong>Question</strong>: Has anyone had this issue and managed to resolve it? Got any tips for me as to where I can look?</p>