Fix one or two tag errors resulting from an uncleared cache

chrome/content/zotero/xpcom/data/dataObjects.js

@@ -104,6 +104,11 @@ Zotero.DataObjects = function (object, objectPlural, id, table) {
 			this._objectCache[id] = store[id];
 		}
 		
+		// If there's an internal reload hook, call it
+		if (this._reload) {
+			this._reload(ids)
+		}
+		
 		// Reload data
 		this._load(ids);
 		

chrome/content/zotero/xpcom/data/tags.js

@@ -396,6 +396,14 @@ Zotero.Tags = new function() {
 	}
 	
 	
+	/**
+	 * Internal reload hook to clear cache
+	 */
+	this._reload = function (ids) {
+		_tags = {};
+	}
+	
+	
 	/**
 	 * Unload tags from caches
 	 *
@@ -432,6 +440,7 @@ Zotero.Tags = new function() {
 			sql += " AND tagID IN (" + Zotero.join(arguments[0], ",") + ")";
 		}
 		var rows = Zotero.DB.query(sql);
+		
 		var ids = [];
 		for each(var row in rows) {
 			var id = row.tagID;