--- a/static/js/ui.js	Thu Dec 27 00:34:49 2012 +0900
+++ b/static/js/ui.js	Thu Dec 27 00:47:02 2012 +0900
@@ -22,17 +22,31 @@
         }
     });
     
+    fruitbar.xhrs = [];
+    fruitbar.xhrs.abort = function() {
+        _(this).each(function(xhr) {
+            xhr.abort();
+        });
+        
+        this.length = 0;
+    };
+    
     fruitbar.on('workspace', function(workspace) {
+        this.xhrs.abort();
+        
         this.tasks.url = '/' + encodeURIComponent(workspace) + '/tasks/';
         this.projects.url = '/' + encodeURIComponent(workspace) + '/projects/';
         
-        this.tasks.fetch();
-        this.projects.fetch();
+        this.xhrs.push(this.tasks.fetch(), this.projects.fetch());
     });
     
     fruitbar.once('workspace', function() {
-        window.setInterval(function() {fruitbar.projects.fetch({update: true});}, 60000);
-        window.setInterval(function() {fruitbar.tasks.fetch({update: true});}, 60000);
+        window.setInterval(function() {
+            fruitbar.xhrs.push(fruitbar.tasks.fetch({update: true}));
+        }, 60000);
+        window.setInterval(function() {
+            fruitbar.xhrs.push(fruitbar.projects.fetch({update: true}));
+        }, 60000);
     });
     
     Backbone.history.start();