diff --git a/erpnext/buying/doctype/purchase_common/purchase_common.py b/erpnext/buying/doctype/purchase_common/purchase_common.py
index 5157f7c..e230e0f 100644
--- a/erpnext/buying/doctype/purchase_common/purchase_common.py
+++ b/erpnext/buying/doctype/purchase_common/purchase_common.py
@@ -407,9 +407,21 @@
 		if not default_currency:
 			msgprint('Message: Please enter default currency in Company Master')
 			raise Exception
-		if (obj.doc.currency == default_currency and flt(obj.doc.conversion_rate) != 1.00) or not obj.doc.conversion_rate or (obj.doc.currency != default_currency and flt(obj.doc.conversion_rate) == 1.00):
-			msgprint("Message: Please Enter Appropriate Conversion Rate.")
-			raise Exception
+			
+		if obj.doc.conversion_rate == 0:
+			msgprint('Conversion Rate cannot be 0', raise_exception=1)
+		elif not obj.doc.conversion_rate:
+			msgprint('Please specify Conversion Rate', raise_exception=1)
+		elif obj.doc.currency == default_currency and \
+				flt(obj.doc.conversion_rate) != 1.00:
+			msgprint("""Conversion Rate should be equal to 1.00, \
+						since the specified Currency and the company's currency \
+						are same""", raise_exception=1)
+		elif obj.doc.currency != default_currency and \
+				flt(obj.doc.conversion_rate) == 1.00:
+			msgprint("""Conversion Rate should not be equal to 1.00, \
+						since the specified Currency and the company's currency \
+						are different""", raise_exception=1)
 
 	def validate_doc(self, obj, prevdoc_doctype, prevdoc_docname):
 		if prevdoc_docname :
diff --git a/erpnext/production/doctype/production_order/production_order.txt b/erpnext/production/doctype/production_order/production_order.txt
index 62aa610..c244399 100644
--- a/erpnext/production/doctype/production_order/production_order.txt
+++ b/erpnext/production/doctype/production_order/production_order.txt
@@ -3,9 +3,9 @@
 
 	# These values are common in all dictionaries
 	{
-		'creation': '2012-03-27 14:36:05',
+		'creation': '2012-05-15 12:14:48',
 		'docstatus': 0,
-		'modified': '2012-03-27 14:45:50',
+		'modified': '2012-05-28 19:03:56',
 		'modified_by': u'Administrator',
 		'owner': u'Administrator'
 	},
@@ -23,7 +23,7 @@
 		'section_style': u'Tabbed',
 		'server_code_error': u' ',
 		'show_in_menu': 0,
-		'version': 190
+		'version': 1
 	},
 
 	# These values are common for all DocField
@@ -323,6 +323,7 @@
 		'fieldname': u'produced_qty',
 		'fieldtype': u'Currency',
 		'label': u'Produced Qty',
+		'no_copy': 1,
 		'oldfieldname': u'produced_qty',
 		'oldfieldtype': u'Currency',
 		'permlevel': 1