diff --git a/erpnext/accounts/doctype/bank_reconciliation/bank_reconciliation.py b/erpnext/accounts/doctype/bank_reconciliation/bank_reconciliation.py
index fc0654e..fae5213 100644
--- a/erpnext/accounts/doctype/bank_reconciliation/bank_reconciliation.py
+++ b/erpnext/accounts/doctype/bank_reconciliation/bank_reconciliation.py
@@ -23,36 +23,36 @@
 
 
 		journal_entries = frappe.db.sql("""
-			select 
-				"Journal Entry" as payment_document, t1.name as payment_entry, 
-				t1.cheque_no as cheque_number, t1.cheque_date, 
+			select
+				"Journal Entry" as payment_document, t1.name as payment_entry,
+				t1.cheque_no as cheque_number, t1.cheque_date,
 				sum(t2.debit_in_account_currency) as debit, sum(t2.credit_in_account_currency) as credit,
-				t1.posting_date, t2.against_account, t1.clearance_date, t2.account_currency 
+				t1.posting_date, t2.against_account, t1.clearance_date, t2.account_currency
 			from
 				`tabJournal Entry` t1, `tabJournal Entry Account` t2
 			where
 				t2.parent = t1.name and t2.account = %s and t1.docstatus=1
-				and t1.posting_date >= %s and t1.posting_date <= %s 
+				and t1.posting_date >= %s and t1.posting_date <= %s
 				and ifnull(t1.is_opening, 'No') = 'No' {0}
 			group by t2.account, t1.name
 			order by t1.posting_date ASC, t1.name DESC
 		""".format(condition), (self.bank_account, self.from_date, self.to_date), as_dict=1)
 
 		payment_entries = frappe.db.sql("""
-			select 
-				"Payment Entry" as payment_document, name as payment_entry, 
-				reference_no as cheque_number, reference_date as cheque_date, 
-				if(paid_from=%(account)s, paid_amount, "") as credit, 
-				if(paid_from=%(account)s, "", received_amount) as debit, 
+			select
+				"Payment Entry" as payment_document, name as payment_entry,
+				reference_no as cheque_number, reference_date as cheque_date,
+				if(paid_from=%(account)s, paid_amount, 0) as credit,
+				if(paid_from=%(account)s, 0, received_amount) as debit,
 				posting_date, ifnull(party,if(paid_from=%(account)s,paid_to,paid_from)) as against_account, clearance_date,
 				if(paid_to=%(account)s, paid_to_account_currency, paid_from_account_currency) as account_currency
 			from `tabPayment Entry`
 			where
 				(paid_from=%(account)s or paid_to=%(account)s) and docstatus=1
 				and posting_date >= %(from)s and posting_date <= %(to)s {0}
-			order by 
+			order by
 				posting_date ASC, name DESC
-		""".format(condition), 
+		""".format(condition),
 		        {"account":self.bank_account, "from":self.from_date, "to":self.to_date}, as_dict=1)
 
 		pos_entries = []
@@ -107,10 +107,10 @@
 					d.clearance_date = None
 
 				frappe.db.set_value(d.payment_document, d.payment_entry, "clearance_date", d.clearance_date)
-				frappe.db.sql("""update `tab{0}` set clearance_date = %s, modified = %s 
-					where name=%s""".format(d.payment_document), 
+				frappe.db.sql("""update `tab{0}` set clearance_date = %s, modified = %s
+					where name=%s""".format(d.payment_document),
 				(d.clearance_date, nowdate(), d.payment_entry))
-				
+
 				clearance_date_updated = True
 
 		if clearance_date_updated:
diff --git a/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.js b/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.js
index 84255b29..288ebc4 100644
--- a/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.js
+++ b/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.js
@@ -49,7 +49,7 @@
 var disable = function(frm){
 	var doc = frm.doc;
 	frappe.call({
-		method: 		"erpnext.healthcare.doctype.healthcare_service_unit_type.healthcare_service_unit_type.disable_enable",
+		method: "erpnext.healthcare.doctype.healthcare_service_unit_type.healthcare_service_unit_type.disable_enable",
 		args: {status: 1, doc_name: doc.name, item: doc.item, is_billable: doc.is_billable},
 		callback: function(){
 			cur_frm.reload_doc();
@@ -60,7 +60,7 @@
 var enable = function(frm){
 	var doc = frm.doc;
 	frappe.call({
-		method: 		"erpnext.healthcare.doctype.healthcare_service_unit_type.healthcare_service_unit_type.disable_enable",
+		method: "erpnext.healthcare.doctype.healthcare_service_unit_type.healthcare_service_unit_type.disable_enable",
 		args: {status: 0, doc_name: doc.name, item: doc.item, is_billable: doc.is_billable},
 		callback: function(){
 			cur_frm.reload_doc();
diff --git a/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.py b/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.py
index 727d035..6504994 100644
--- a/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.py
+++ b/erpnext/healthcare/doctype/healthcare_service_unit_type/healthcare_service_unit_type.py
@@ -111,7 +111,7 @@
 		frappe.db.set_value("Healthcare Service Unit Type", doc_name, "item_code", item_code)
 
 @frappe.whitelist()
-def disable_enable(status, doc_name, item,  is_billable):
+def disable_enable(status, doc_name, item=None,  is_billable=None):
 	frappe.db.set_value("Healthcare Service Unit Type", doc_name, "disabled", status)
 	if(is_billable == 1):
 		frappe.db.set_value("Item", item, "disabled", status)
diff --git a/erpnext/hr/doctype/salary_slip/salary_slip.py b/erpnext/hr/doctype/salary_slip/salary_slip.py
index 3fd266b..684f348 100644
--- a/erpnext/hr/doctype/salary_slip/salary_slip.py
+++ b/erpnext/hr/doctype/salary_slip/salary_slip.py
@@ -441,7 +441,7 @@
 	def calculate_net_pay(self):
 		if self.salary_structure:
 			self.calculate_component_amounts()
-		
+
 		disable_rounded_total = cint(frappe.db.get_value("Global Defaults", None, "disable_rounded_total"))
 		precision = frappe.defaults.get_global_default("currency_precision")
 		self.total_deduction = 0
@@ -452,10 +452,10 @@
 
 		self.set_loan_repayment()
 
-		self.net_pay = flt(self.gross_pay) - (flt(self.total_deduction) + flt(self.total_loan_repayment))
+		self.net_pay = (flt(self.gross_pay) - (flt(self.total_deduction) + flt(self.total_loan_repayment))) * flt(self.payment_days / self.total_working_days)
 		self.rounded_total = rounded(self.net_pay,
 			self.precision("net_pay") if disable_rounded_total else 0)
-		
+
 		if self.net_pay < 0:
 			frappe.throw(_("Net Pay cannnot be negative"))
 
diff --git a/erpnext/projects/doctype/task/task.py b/erpnext/projects/doctype/task/task.py
index fffa9c1..1230278 100755
--- a/erpnext/projects/doctype/task/task.py
+++ b/erpnext/projects/doctype/task/task.py
@@ -159,6 +159,13 @@
 
 		self.update_nsm_model()
 
+	def update_status(self):
+		if self.status not in ('Cancelled', 'Closed') and self.exp_end_date:
+			from datetime import datetime
+			if self.exp_end_date < datetime.now().date():
+				self.db_set('status', 'Overdue')
+				self.update_project()
+
 @frappe.whitelist()
 def check_if_child_exists(name):
 	child_tasks = frappe.get_all("Task", filters={"parent_task": name})
@@ -186,10 +193,9 @@
 		task.save()
 
 def set_tasks_as_overdue():
-	frappe.db.sql("""update tabTask set `status`='Overdue'
-		where exp_end_date is not null
-		and exp_end_date < CURDATE()
-		and `status` not in ('Closed', 'Cancelled')""")
+	tasks = frappe.get_all("Task", filters={'status':['not in',['Cancelled', 'Closed']]})
+	for task in tasks:
+		frappe.get_doc("Task", task.name).update_status()
 
 @frappe.whitelist()
 def get_children(doctype, parent, task=None, project=None, is_root=False):
diff --git a/erpnext/projects/doctype/task/test_task.py b/erpnext/projects/doctype/task/test_task.py
index 9971946..b733f67 100644
--- a/erpnext/projects/doctype/task/test_task.py
+++ b/erpnext/projects/doctype/task/test_task.py
@@ -117,4 +117,4 @@
 		if save:
 			task.save()
 
-	return task
\ No newline at end of file
+	return task
diff --git a/erpnext/setup/doctype/brand/test_records.json b/erpnext/setup/doctype/brand/test_records.json
index d2a4ad4..e4f892e 100644
--- a/erpnext/setup/doctype/brand/test_records.json
+++ b/erpnext/setup/doctype/brand/test_records.json
@@ -1,6 +1,6 @@
 [
  {
-  "brand": "_Test Brand", 
+  "brand": "_Test Brand",
   "doctype": "Brand"
  }
 ]
\ No newline at end of file
diff --git a/erpnext/stock/doctype/item/item.py b/erpnext/stock/doctype/item/item.py
index bd06688..8321b3e 100644
--- a/erpnext/stock/doctype/item/item.py
+++ b/erpnext/stock/doctype/item/item.py
@@ -758,6 +758,9 @@
 					d.conversion_factor = value
 
 	def validate_attributes(self):
+		if not self.variant_based_on:
+			self.variant_based_on = 'Item Attribute'
+
 		if (self.has_variants or self.variant_of) and self.variant_based_on == 'Item Attribute':
 			attributes = []
 			if not self.attributes:
@@ -780,7 +783,7 @@
 			variant = get_variant(self.variant_of, args, self.name)
 			if variant:
 				frappe.throw(_("Item variant {0} exists with same attributes")
-                                    .format(variant), ItemVariantExistsError)
+					.format(variant), ItemVariantExistsError)
 
 			validate_item_variant_attributes(self, args)
 
diff --git a/erpnext/stock/doctype/item/test_item.py b/erpnext/stock/doctype/item/test_item.py
index aa67c33..ac499e0 100644
--- a/erpnext/stock/doctype/item/test_item.py
+++ b/erpnext/stock/doctype/item/test_item.py
@@ -17,7 +17,7 @@
 from six import iteritems
 
 test_ignore = ["BOM"]
-test_dependencies = ["Warehouse", "Item Group"]
+test_dependencies = ["Warehouse", "Item Group", "Brand"]
 
 def make_item(item_code, properties=None):
 	if frappe.db.exists("Item", item_code):