diff --git a/erpnext/__version__.py b/erpnext/__version__.py
index 980bc6f..f50f14b 100644
--- a/erpnext/__version__.py
+++ b/erpnext/__version__.py
@@ -1 +1 @@
-__version__ = '4.18.0'
+__version__ = '4.18.1'
diff --git a/erpnext/accounts/print_format/payment_receipt_voucher/payment_receipt_voucher.json b/erpnext/accounts/print_format/payment_receipt_voucher/payment_receipt_voucher.json
index 04fe746..310a4df 100755
--- a/erpnext/accounts/print_format/payment_receipt_voucher/payment_receipt_voucher.json
+++ b/erpnext/accounts/print_format/payment_receipt_voucher/payment_receipt_voucher.json
@@ -1,15 +1,15 @@
 {
- "creation": "2012-05-01 12:46:31", 
- "doc_type": "Journal Voucher", 
- "docstatus": 0, 
- "doctype": "Print Format", 
- "html": "{%- from \"templates/print_formats/standard_macros.html\" import add_header -%}\n<div class=\"page-break\">\n    {%- if not doc.get(\"print_heading\") and not doc.get(\"select_print_heading\") \n        and doc.set(\"select_print_heading\", _(\"Payment Receipt Note\")) -%}{%- endif -%}\n    {{ add_header(0, 1, doc, letter_head, no_letterhead) }}\n\n    {%- for label, value in (\n        (_(\"Received On\"), frappe.utils.formatdate(doc.voucher_date)),\n        (_(\"Received From\"), doc.pay_to_recd_from),\n        (_(\"Amount\"), \"<strong>\" + doc.total_amount or 0 + \"</strong><br>\" + (doc.total_amount_in_words or \"\") + \"<br>\"),\n        (_(\"Remarks\"), doc.remark)\n    ) -%}\n    <div class=\"row\">\n        <div class=\"col-xs-3\"><label class=\"text-right\">{{ label }}</label></div>\n        <div class=\"col-xs-9\">{{ value }}</div>\n    </div>\n\n    {%- endfor -%}\n\n    <hr>\n    <br>\n    <p class=\"strong\">\n        {{ _(\"For\") }} {{ doc.company }},<br>\n        <br>\n        <br>\n        <br>\n        {{ _(\"Authorized Signatory\") }}\n    </p>\n</div>\n\n", 
- "idx": 1, 
- "modified": "2015-01-12 11:03:22.893209", 
- "modified_by": "Administrator", 
- "module": "Accounts", 
- "name": "Payment Receipt Voucher", 
- "owner": "Administrator", 
- "print_format_type": "Server", 
+ "creation": "2012-05-01 12:46:31",
+ "doc_type": "Journal Voucher",
+ "docstatus": 0,
+ "doctype": "Print Format",
+ "html": "{%- from \"templates/print_formats/standard_macros.html\" import add_header -%}\n<div class=\"page-break\">\n    {%- if not doc.get(\"print_heading\") and not doc.get(\"select_print_heading\") \n        and doc.set(\"select_print_heading\", _(\"Payment Receipt Note\")) -%}{%- endif -%}\n    {{ add_header(0, 1, doc, letter_head, no_letterhead) }}\n\n    {%- for label, value in (\n        (_(\"Received On\"), frappe.utils.formatdate(doc.voucher_date)),\n        (_(\"Received From\"), doc.pay_to_recd_from),\n        (_(\"Amount\"), \"<strong>\" + frappe.utils.cstr(doc.total_amount or 0) + \"</strong><br>\" + (doc.total_amount_in_words or \"\") + \"<br>\"),\n        (_(\"Remarks\"), doc.remark)\n    ) -%}\n    <div class=\"row\">\n        <div class=\"col-xs-3\"><label class=\"text-right\">{{ label }}</label></div>\n        <div class=\"col-xs-9\">{{ value }}</div>\n    </div>\n\n    {%- endfor -%}\n\n    <hr>\n    <br>\n    <p class=\"strong\">\n        {{ _(\"For\") }} {{ doc.company }},<br>\n        <br>\n        <br>\n        <br>\n        {{ _(\"Authorized Signatory\") }}\n    </p>\n</div>\n\n",
+ "idx": 1,
+ "modified": "2015-01-16 11:03:22.893209",
+ "modified_by": "Administrator",
+ "module": "Accounts",
+ "name": "Payment Receipt Voucher",
+ "owner": "Administrator",
+ "print_format_type": "Server",
  "standard": "Yes"
-}
\ No newline at end of file
+}
diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index dfa0b2e..c72cefc 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -4,7 +4,7 @@
 app_description = "Open Source Enterprise Resource Planning for Small and Midsized Organizations"
 app_icon = "icon-th"
 app_color = "#e74c3c"
-app_version = "4.18.0"
+app_version = "4.18.1"
 
 error_report_email = "support@erpnext.com"
 
diff --git a/erpnext/patches/v4_2/discount_amount.py b/erpnext/patches/v4_2/discount_amount.py
index e23a10e..3ce10ca 100644
--- a/erpnext/patches/v4_2/discount_amount.py
+++ b/erpnext/patches/v4_2/discount_amount.py
@@ -6,7 +6,7 @@
 from frappe.modules import scrub, get_doctype_module
 
 def execute():
-	for dt in ["Quotation", "Sales Order", "Delivery Note", "Sales invoice"]:
+	for dt in ["Quotation", "Sales Order", "Delivery Note", "Sales Invoice"]:
 		frappe.reload_doc(get_doctype_module(dt), "doctype", scrub(dt))
 		frappe.db.sql("""update `tab{0}` set base_discount_amount=discount_amount,
 			discount_amount=discount_amount/conversion_rate""".format(dt))
diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index 4f3480c..81a2f59 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -45,7 +45,6 @@
 		self.validate_warehouse(pro_obj)
 		self.validate_production_order()
 		self.get_stock_and_rate()
-		self.validate_incoming_rate()
 		self.validate_bom()
 		self.validate_finished_goods()
 		self.validate_return_reference_doc()
@@ -190,16 +189,10 @@
 					+ self.production_order + ":" + ", ".join(other_ste), DuplicateEntryForProductionOrderError)
 
 	def validate_valuation_rate(self):
-		if self.purpose in ["Manufacture", "Repack"]:
-			valuation_at_source, valuation_at_target = 0, 0
-			for d in self.get("mtn_details"):
-				if d.s_warehouse and not d.t_warehouse:
-					valuation_at_source += flt(d.amount)
-				if d.t_warehouse and not d.s_warehouse:
-					valuation_at_target += flt(d.amount)
+		for d in self.get('mtn_details'):
+			if d.t_warehouse:
+				self.validate_value("incoming_rate", ">", 0, d, raise_exception=IncorrectValuationRateError)
 
-			if valuation_at_target < valuation_at_source:
-				frappe.throw(_("Total valuation for manufactured or repacked item(s) can not be less than total valuation of raw materials"))
 
 	def set_total_amount(self):
 		self.total_amount = sum([flt(item.amount) for item in self.get("mtn_details")])
@@ -241,7 +234,7 @@
 					incoming_rate = flt(self.get_incoming_rate(args), self.precision("incoming_rate", d))
 					if incoming_rate > 0:
 						d.incoming_rate = incoming_rate
-				d.amount = flt(d.transfer_qty) * flt(d.incoming_rate)
+				d.amount = flt(flt(d.transfer_qty) * flt(d.incoming_rate), self.precision("amount", d))
 				if not d.t_warehouse:
 					raw_material_cost += flt(d.amount)
 
@@ -255,8 +248,9 @@
 						if d.bom_no:
 							bom = frappe.db.get_value("BOM", d.bom_no, ["operating_cost", "quantity"], as_dict=1)
 							operation_cost_per_unit = flt(bom.operating_cost) / flt(bom.quantity)
-						d.incoming_rate = operation_cost_per_unit + (raw_material_cost + flt(self.total_fixed_cost)) / flt(d.transfer_qty)
-					d.amount = flt(d.transfer_qty) * flt(d.incoming_rate)
+						d.incoming_rate = flt(operation_cost_per_unit +
+							(raw_material_cost + flt(self.total_fixed_cost)) / flt(d.transfer_qty), self.precision("incoming_rate", d))
+					d.amount = flt(flt(d.transfer_qty) * flt(d.incoming_rate), self.precision("transfer_qty", d))
 					break
 
 	def get_incoming_rate(self, args):
@@ -280,11 +274,6 @@
 
 		return incoming_rate
 
-	def validate_incoming_rate(self):
-		for d in self.get('mtn_details'):
-			if d.t_warehouse:
-				self.validate_value("incoming_rate", ">", 0, d, raise_exception=IncorrectValuationRateError)
-
 	def validate_bom(self):
 		for d in self.get('mtn_details'):
 			if d.bom_no and not frappe.db.sql("""select name from `tabBOM`
diff --git a/setup.py b/setup.py
index e949dd6..146361f 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 import os
 
-version = "4.18.0"
+version = "4.18.1"
 
 with open("requirements.txt", "r") as f:
 	install_requires = f.readlines()