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>     ensureMetaData: function caldav_ensureMetaData() {
>         let self = this;
>         let refreshNeeded = false;
>         let getMetaListener = {
>             onGetResult: function meta_onGetResult(aCalendar, aStatus, aItemType, aDetail, aCount, aItems) {
>                 for each (let item in aItems) {
>                     if (!(item.id in self.mItemInfoCache)) {
>                         let path = self.getItemLocationPath(item);
>                         cal.LOG("Adding meta-data for cached item " + item.id);
>                         self.mItemInfoCache[item.id] = { etag: null,
>                                                          isNew: false,
>                                                          locationPath: path,
>                                                          isInboxItem: false};
>                         self.mHrefIndex[self.mLocationPath + path] = item.id;
>                         refreshNeeded = true;
>                     }
>                 }
>             },
>             onOperationComplete: function meta_onOperationComplete(aCalendar, aStatus, aOpType, aId, aDetail) {
>                 if (refreshNeeded) {
>                     // reseting the cached ctag forces an item refresh when
>                     // safeRefresh is called later
>                     self.mCtag = null;
>                 }
>             }
>         };
>         this.mOfflineStorage.getItems(calICalendar.ITEM_FILTER_ALL_ITEMS,
>                                       0, null, null, getMetaListener);
>     },
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<         var cacheIds = {};
<         var cacheValues = {};
---
>         let cacheIds = {};
>         let cacheValues = {};
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<         let needsResave = false;
<         let calendarProperties = null;
<         for (var count = 0; count < cacheIds.length; count++) {
<             var itemId = cacheIds[count];
<             var itemData = cacheValues[count];
---
>         for (let count = 0; count < cacheIds.length; count++) {
>             let itemId = cacheIds[count];
>             let itemData = cacheValues[count];
282,285c309,312
<                 var itemDataArray = itemData.split("\u001A");
<                 var etag = itemDataArray[0];
<                 var resourcePath = itemDataArray[1];
<                 var isInboxItem = itemDataArray[2];
---
>                 let itemDataArray = itemData.split("\u001A");
>                 let etag = itemDataArray[0];
>                 let resourcePath = itemDataArray[1];
>                 let isInboxItem = itemDataArray[2];
288c315
<                     var locationPath = resourcePath
---
>                     let locationPath = resourcePath
290c317
<                     var item = { etag: etag,
---
>                     let item = { etag: etag,
297a325
>         this.ensureMetaData();