Address Yury's comments.

src/core.js

@@ -45,7 +45,7 @@ function getPdf(arg, callback) {
         var data = (xhr.mozResponseArrayBuffer || xhr.mozResponse ||
                     xhr.responseArrayBuffer || xhr.response);
         callback(data);
-      } else {
+      } else if (params.error) {
         params.error(e);
       }
     }

src/worker.js

@@ -75,10 +75,11 @@ var WorkerMessageHandler = {
       var start = Date.now();
 
       var dependency = [];
+      var IRQueue = null;
       try {
         var page = pdfDoc.getPage(pageNum);
         // Pre compile the pdf page and fetch the fonts/images.
-        var IRQueue = page.getIRQueue(handler, dependency);
+        IRQueue = page.getIRQueue(handler, dependency);
       } catch (e) {
         // Turn the error into an obj that can be serialized
         e = {

web/viewer.html

@@ -109,7 +109,7 @@
       </div>
       <div id="errorMessageRight">
         <button id="errorClose" oncontextmenu="return false;">
-          X
+          Close
         </button>
       </div>
       <div class="clearBoth"></div>