diff --git a/services/sync/modules/service.js b/services/sync/modules/service.js
index 056788b4d919..266f703a7855 100644
--- a/services/sync/modules/service.js
+++ b/services/sync/modules/service.js
@@ -510,8 +510,12 @@ WeaveSvc.prototype = {
   },
   _syncEngine: function WeaveSvc__syncEngine(engine) {
     let self = yield;
-    engine.sync(self.cb);
-    yield;
+    try {
+      engine.sync(self.cb);
+      yield;
+    } catch(e) {
+      this._log.error(e.toString());
+    }
   },
 
   resetServer: function WeaveSync_resetServer(onComplete) {
diff --git a/services/sync/modules/util.js b/services/sync/modules/util.js
index 873382f63918..d28e7326b288 100644
--- a/services/sync/modules/util.js
+++ b/services/sync/modules/util.js
@@ -109,8 +109,7 @@ let Utils = {
       return thing;
     let ret;
 
-    if (thing instanceof Array) {
-      dump("making a cipy of an array!\n\n");
+    if ("Array" == thing.constructor.name) {
       ret = [];
       for (let i = 0; i < thing.length; i++)
         ret.push(Utils.deepCopy(thing[i]));