diff -r 106909df0c17 -r 8d1fdb148c27 taskapp/forms/task.py
--- a/taskapp/forms/task.py	Tue Mar 02 15:34:51 2010 +0530
+++ b/taskapp/forms/task.py	Tue Mar 02 16:04:41 2010 +0530
@@ -7,6 +7,14 @@
         fields = ['title', 'desc', 'tags_field', 'credits']
     #publish = forms.BooleanField(required=False)
 
+    def clean_title(self):
+        data = self.cleaned_data['title'].strip()
+        try:
+            Task.objects.exclude(status="DL").get(title__iexact=data)
+            raise forms.ValidationError("Another task with same title exists")
+        except Task.DoesNotExist:
+            return data
+
     def clean_desc(self):
         data = self.cleaned_data['desc'].strip()
         if not data:
@@ -27,6 +35,17 @@
 
             return data
 
+        def clean_title(self):
+            data = self.cleaned_data['title'].strip()
+            try:
+                prev_task = Task.objects.exclude(status="DL").get(title__iexact=data)
+                if prev_task != task:
+                    raise forms.ValidationError("Another task with same title exists")
+                else:
+                    return data
+            except:
+                return data
+
     data = {
         'title': task.title,
         'desc': task.desc,