title: Meteor 0.8.0 update throws out a "non function" error
body: <p>After the Meteor update to 0.8.0 I had some issues with iron-router, but I was able to fix them by adding the <code>blade-layout</code> package and updating <code>iron-router</code>...</p>
  
  <p>However, now I get the following error in the browser console, (the normal console doesn't throw out any errors, just tells me app is running at localhost:3000).</p>
  
  <p>This is the error I get in the browser console when I try to visit the home page. This only started happening after I updated to Meteor 0.8.0</p>
  
  <pre><code>Exception in defer callback: Error: Can't call non-function: [object Object]
      at Spacebars.call (http://localhost:3000/packages/spacebars.js?5d478ab1c940b6f5a88f78b8adc81a47f022da77:176:13)
      at Spacebars.mustacheImpl (http://localhost:3000/packages/spacebars.js?5d478ab1c940b6f5a88f78b8adc81a47f022da77:110:25)
      at Object.Spacebars.mustache (http://localhost:3000/packages/spacebars.js?5d478ab1c940b6f5a88f78b8adc81a47f022da77:114:39)
      at Template.__define__.HTML.DIV.class (http://localhost:3000/client/html/template.page_layout.js?b9f71b600d93464d684baf69d25d5f1c78c77785:6:22)
      at http://localhost:3000/packages/ui.js?b523ef986d3d39671bcb40319d0df8982acacfe8:2299:21
      at callWithNoYieldsAllowed (http://localhost:3000/packages/deps.js?7afb832ce6e6c89421fa70dc066201f16f9b9105:74:5)
      at _.extend._compute (http://localhost:3000/packages/deps.js?7afb832ce6e6c89421fa70dc066201f16f9b9105:212:7)
      at new Deps.Computation (http://localhost:3000/packages/deps.js?7afb832ce6e6c89421fa70dc066201f16f9b9105:144:10)
      at Object._.extend.autorun (http://localhost:3000/packages/deps.js?7afb832ce6e6c89421fa70dc066201f16f9b9105:361:13)
      at materialize (http://localhost:3000/packages/ui.js?b523ef986d3d39671bcb40319d0df8982acacfe8:2298:29) debug.js:41
  </code></pre>
  
  <p>If anyone else has experienced this error, please let me know what it means with a possible solution.</p>
  
  <p>I appreciate the help. </p>