Closes issue #309.

common/content/commandline.js

@@ -843,13 +843,11 @@ var CommandLine = Module("commandline", {
 
         let output = [];
         function observe(str, highlight, dom) {
-            util.dumpStack();
             output.push(dom && !isString(str) ? dom : str);
         }
 
         this.savingOutput = true;
         dactyl.trapErrors.apply(dactyl, [fn, self].concat(Array.slice(arguments, 2)));
-        util.dump(output);
         this.savingOutput = false;
         return output.map(function (elem) elem instanceof Node ? util.domToString(elem) : elem)
                      .join("\n");

common/modules/finder.jsm

@@ -730,7 +730,10 @@ var RangeFind = Class("RangeFind", {
     },
     nodeRange: function (node) {
         let range = node.ownerDocument.createRange();
-        range.selectNode(node);
+        try {
+            range.selectNode(node);
+        }
+        catch (e) {}
         return range;
     },
     sameDocument: function (r1, r2) r1 && r2 && r1.endContainer.ownerDocument == r2.endContainer.ownerDocument,