diff --git a/frappe/core/doctype/user/user.py b/frappe/core/doctype/user/user.py
index c6d5b65c52..06b1e863b1 100644
--- a/frappe/core/doctype/user/user.py
+++ b/frappe/core/doctype/user/user.py
@@ -27,6 +27,7 @@ class User(Document):
 		self.add_system_manager_role()
 		self.check_enable_disable()
 		self.update_gravatar()
+		self.ensure_unique_roles()
 		self.remove_all_roles_for_guest()
 		if self.language == "Loading...":
 			self.language = None
@@ -255,6 +256,14 @@ class User(Document):
 		if self.name == "Guest":
 			self.set("user_roles", list(set(d for d in self.get("user_roles") if d.role == "Guest")))
 
+	def ensure_unique_roles(self):
+		exists = []
+		for i, d in enumerate(self.get("user_roles")):
+			if (not d.role) or (d.role in exists):
+				self.get("user_roles").remove(d)
+			else:
+				exists.append(d.role)
+
 @frappe.whitelist()
 def get_languages():
 	from frappe.translate import get_lang_dict
diff --git a/frappe/core/doctype/userrole/userrole.json b/frappe/core/doctype/userrole/userrole.json
index fb9094cb33..b0f5f373ed 100644
--- a/frappe/core/doctype/userrole/userrole.json
+++ b/frappe/core/doctype/userrole/userrole.json
@@ -1,7 +1,7 @@
 {
  "allow_copy": 0, 
  "autoname": "UR.#####", 
- "creation": "2013-02-06 11:30:13.000000", 
+ "creation": "2013-02-06 11:30:13", 
  "docstatus": 0, 
  "doctype": "DocType", 
  "fields": [
@@ -16,7 +16,7 @@
    "options": "Role", 
    "permlevel": 0, 
    "print_width": "200px", 
-   "reqd": 0, 
+   "reqd": 1, 
    "search_index": 0, 
    "width": "200px"
   }
@@ -26,10 +26,11 @@
  "idx": 1, 
  "issingle": 0, 
  "istable": 1, 
- "modified": "2013-12-20 19:21:54.000000", 
+ "modified": "2014-06-17 06:56:28.816283", 
  "modified_by": "Administrator", 
  "module": "Core", 
  "name": "UserRole", 
  "owner": "Administrator", 
+ "permissions": [], 
  "read_only": 0
 }
\ No newline at end of file
diff --git a/frappe/core/page/data_import_tool/importer.py b/frappe/core/page/data_import_tool/importer.py
index 36034b01bf..2e8e0609e0 100644
--- a/frappe/core/page/data_import_tool/importer.py
+++ b/frappe/core/page/data_import_tool/importer.py
@@ -172,8 +172,12 @@ def upload(rows = None, submit_after_import=None, ignore_encoding_errors=False,
 		overwrite = params.get('overwrite')
 
 	# delete child rows (if parenttype)
-	if parenttype and overwrite:
-		delete_child_rows(data, doctype)
+	parentfield = None
+	if parenttype:
+		parentfield = get_parent_field(doctype, parenttype)
+
+		if overwrite:
+			delete_child_rows(data, doctype)
 
 	ret = []
 	error = False
@@ -188,13 +192,12 @@ def upload(rows = None, submit_after_import=None, ignore_encoding_errors=False,
 		doc = get_doc(row_idx)
 		try:
 			frappe.local.message_log = []
-			if doc.get("parentfield"):
-				parent = frappe.get_doc(doc["parenttype"], doc["parentfield"])
-				parent.append(doc)
+			if parentfield:
+				parent = frappe.get_doc(parenttype, doc["parent"])
+				doc = parent.append(parentfield, doc)
 				parent.save()
 				ret.append('Inserted row for %s at #%s' % (getlink(parenttype,
 					doc.parent), unicode(doc.idx)))
-
 			else:
 				if overwrite and frappe.db.exists(doctype, doc["name"]):
 					original = frappe.get_doc(doctype, doc["name"])
diff --git a/frappe/tests/test_data_import.py b/frappe/tests/test_data_import.py
index e5cccc9789..7633a52621 100644
--- a/frappe/tests/test_data_import.py
+++ b/frappe/tests/test_data_import.py
@@ -46,6 +46,32 @@ class TestDataImport(unittest.TestCase):
 		importer.upload(content, overwrite=True)
 		self.assertTrue(frappe.db.get_value("Blog Category", "test-category", "title"), "New Title")
 
+	def test_import_only_children(self):
+		user_email = "test_import_userrole@example.com"
+		if frappe.db.exists("User", user_email):
+			frappe.delete_doc("User", user_email)
+
+		frappe.get_doc({"doctype": "User", "email": user_email, "first_name": "Test Import UserRole"}).insert()
+
+		exporter.get_template("UserRole", "User", all_doctypes="No", with_data="No")
+		content = read_csv_content(frappe.response.result)
+		content.append(["", "test_import_userrole@example.com", "Blogger"])
+		importer.upload(content)
+
+		user = frappe.get_doc("User", user_email)
+		self.assertEquals(len(user.get("user_roles")), 1)
+		self.assertTrue(user.get("user_roles")[0].role, "Blogger")
+
+		# overwrite
+		exporter.get_template("UserRole", "User", all_doctypes="No", with_data="No")
+		content = read_csv_content(frappe.response.result)
+		content.append(["", "test_import_userrole@example.com", "Website Manager"])
+		importer.upload(content, overwrite=True)
+
+		user = frappe.get_doc("User", user_email)
+		self.assertEquals(len(user.get("user_roles")), 1)
+		self.assertTrue(user.get("user_roles")[0].role, "Website Manager")
+
 	def test_import_with_children(self):
 		exporter.get_template("Event", all_doctypes="Yes", with_data="No")
 		content = read_csv_content(frappe.response.result)