diff --git a/manufacturing/doctype/bom/bom.txt b/manufacturing/doctype/bom/bom.txt
index a2495d5931f..90bcfc71b9d 100644
--- a/manufacturing/doctype/bom/bom.txt
+++ b/manufacturing/doctype/bom/bom.txt
@@ -2,9 +2,9 @@
  {
   "owner": "Administrator", 
   "docstatus": 0, 
-  "creation": "2012-07-03 13:30:03", 
+  "creation": "2012-12-10 19:03:43", 
   "modified_by": "Administrator", 
-  "modified": "2012-12-10 18:30:00"
+  "modified": "2012-12-11 15:13:42"
  }, 
  {
   "istable": 0, 
@@ -177,12 +177,6 @@
   "fieldtype": "Float", 
   "permlevel": 1
  }, 
- {
-  "doctype": "DocField", 
-  "fieldname": "col_break24", 
-  "fieldtype": "Column Break", 
-  "permlevel": 0
- }, 
  {
   "doctype": "DocField", 
   "label": "Total Cost", 
@@ -222,6 +216,7 @@
   "doctype": "DocField", 
   "label": "Item Description", 
   "oldfieldname": "description", 
+  "width": "300px", 
   "fieldname": "description", 
   "fieldtype": "Small Text", 
   "permlevel": 0
@@ -275,7 +270,7 @@
  {
   "print_hide": 0, 
   "doctype": "DocField", 
-  "label": "BOM Explosion Items", 
+  "label": "Exploded BOM Items", 
   "options": "Simple", 
   "fieldname": "section_break0", 
   "fieldtype": "Section Break", 
@@ -288,7 +283,7 @@
   "no_copy": 1, 
   "oldfieldtype": "Table", 
   "doctype": "DocField", 
-  "label": "BOM Explosion Item", 
+  "label": "Exploded BOM Items", 
   "oldfieldname": "flat_bom_details", 
   "default": "No Toolbar", 
   "fieldname": "flat_bom_details", 
diff --git a/manufacturing/doctype/bom_replace_tool/bom_replace_tool.py b/manufacturing/doctype/bom_replace_tool/bom_replace_tool.py
index d9d9598424c..96e12d97203 100644
--- a/manufacturing/doctype/bom_replace_tool/bom_replace_tool.py
+++ b/manufacturing/doctype/bom_replace_tool/bom_replace_tool.py
@@ -31,9 +31,8 @@ class DocType:
 		bom_list = self.get_parent_boms()
 		for bom in bom_list:
 			bom_obj = get_obj("BOM", bom, with_children=1)
-			bom_obj.update_cost_by_traversing()
-			bom_obj.update_flat_bom_by_traversing()
-		
+			bom_obj.on_update()
+
 	def validate_bom(self):
 		if cstr(self.doc.current_bom) == cstr(self.doc.new_bom):
 			msgprint("Current BOM and New BOM can not be same", raise_exception=1)
diff --git a/patches/december_2012/production_cleanup.py b/patches/december_2012/production_cleanup.py
index 8e226bdfd48..0c25b895ae9 100644
--- a/patches/december_2012/production_cleanup.py
+++ b/patches/december_2012/production_cleanup.py
@@ -3,6 +3,7 @@ import webnotes
 def execute():
 	delete_doctypes()
 	rename_module()
+	rebuilt_exploded_bom()
 	
 def delete_doctypes():
 	from webnotes.model import delete_doc
@@ -14,17 +15,23 @@ def rename_module():
 	webnotes.reload_doc("core", "doctype", "page")
 	webnotes.reload_doc("core", "doctype", "module_def")
 
-	webnotes.rename_doc("Role", "Production User", "Manufacturing User")
-	webnotes.rename_doc("Role", "Production Manager", "Manufacturing Manager")
+	if webnotes.conn.exists("Role", "Production User"):
+		webnotes.rename_doc("Role", "Production User", "Manufacturing User")
+	if webnotes.conn.exists("Role", "Production Manager"):
+		webnotes.rename_doc("Role", "Production Manager", "Manufacturing Manager")
 
 	if webnotes.conn.exists("Page", "manufacturing-home"):
 		webnotes.delete_doc("Page", "production-home")
 	else:
 		webnotes.rename_doc("Page", "production-home", "manufacturing-home")
 
-	webnotes.rename_doc("Module Def", "Production", "Manufacturing")
+	if webnotes.conn.exists("Module Def", "Production"):
+		webnotes.rename_doc("Module Def", "Production", "Manufacturing")
 	
 	webnotes.conn.set_global("modules_list",
 		webnotes.conn.get_global('modules_list').replace("Production", "Manufacturing"))
 	
-	
\ No newline at end of file
+def rebuilt_exploded_bom():
+	from webnotes.model.code import get_obj
+	for bom in webnotes.conn.sql("""select name from `tabBOM` where docstatus < 2"""):
+		get_obj("BOM", bom[0], with_children=1).on_update()