diff --git a/erpnext/accounts/report/budget_variance_report/budget_variance_report.py b/erpnext/accounts/report/budget_variance_report/budget_variance_report.py
index 75739d9..0840281 100644
--- a/erpnext/accounts/report/budget_variance_report/budget_variance_report.py
+++ b/erpnext/accounts/report/budget_variance_report/budget_variance_report.py
@@ -65,20 +65,20 @@
 
 	return columns + [_("Total Target") + ":Float:120", _("Total Actual") + ":Float:120",
 		_("Total Variance") + ":Float:120"]
-		
+
 def get_cost_centers(filters):
 	cond = "and 1=1"
 	if filters.get("budget_against") == "Cost Center":
 		cond = "order by lft"
 
-	return frappe.db.sql_list("""select name from `tab{tab}` where company=%s 
+	return frappe.db.sql_list("""select name from `tab{tab}` where company=%s
 		{cond}""".format(tab=filters.get("budget_against"), cond=cond), filters.get("company"))
 
 #Get cost center & target details
 def get_cost_center_target_details(filters):
 	cond = ""
 	if filters.get("cost_center"):
-		cond += " and b.cost_center='%s'" % frappe.db.escape(filters.get("cost_center"))
+		cond += " and b.cost_center=%s" % frappe.db.escape(filters.get("cost_center"))
 
 	return frappe.db.sql("""
 			select b.{budget_against} as budget_against, b.monthly_distribution, ba.account, ba.budget_amount
@@ -106,7 +106,7 @@
 	if filters.get("budget_against") == "Cost Center":
 		cc_lft, cc_rgt = frappe.db.get_value("Cost Center", name, ["lft", "rgt"])
 		cond = "lft>='{lft}' and rgt<='{rgt}'".format(lft = cc_lft, rgt=cc_rgt)
-	
+
 	ac_details = frappe.db.sql("""select gl.account, gl.debit, gl.credit,
 		MONTHNAME(gl.posting_date) as month_name, b.{budget_against} as budget_against
 		from `tabGL Entry` gl, `tabBudget Account` ba, `tabBudget` b
@@ -115,7 +115,7 @@
 			and b.docstatus = 1
 			and ba.account=gl.account
 			and b.{budget_against} = gl.{budget_against}
-			and gl.fiscal_year=%s 
+			and gl.fiscal_year=%s
 			and b.{budget_against}=%s
 			and exists(select name from `tab{tab}` where name=gl.{budget_against} and {cond}) group by gl.name
 	""".format(tab = filters.budget_against, budget_against = budget_against, cond = cond),
@@ -136,7 +136,7 @@
 
 	for ccd in cost_center_target_details:
 		actual_details = get_actual_details(ccd.budget_against, filters)
-		
+
 		for month_id in range(1, 13):
 			month = datetime.date(2013, month_id, 1).strftime('%B')
 
@@ -150,7 +150,7 @@
 				if ccd.monthly_distribution else 100.0/12
 
 			tav_dict.target = flt(ccd.budget_amount) * month_percentage / 100
-			
+
 			for ad in actual_details.get(ccd.account, []):
 				if ad.month_name == month:
 						tav_dict.actual += flt(ad.debit) - flt(ad.credit)
diff --git a/erpnext/controllers/queries.py b/erpnext/controllers/queries.py
index 4c4bf78..8a1f799 100644
--- a/erpnext/controllers/queries.py
+++ b/erpnext/controllers/queries.py
@@ -219,7 +219,7 @@
 def get_project_name(doctype, txt, searchfield, start, page_len, filters):
 	cond = ''
 	if filters.get('customer'):
-		cond = """(`tabProject`.customer = '%s' or
+		cond = """(`tabProject`.customer = %s or
 			ifnull(`tabProject`.customer,"")="") and""" %(frappe.db.escape(filters.get("customer")))
 
 	return frappe.db.sql("""select `tabProject`.name from `tabProject`
@@ -398,7 +398,7 @@
 		CONCAT_WS(" : ", "Actual Qty", ifnull( ({sub_query}), 0) ) as actual_qty
 		from `tabWarehouse`
 		where
-		   `tabWarehouse`.`{key}` like '{txt}'
+		   `tabWarehouse`.`{key}` like {txt}
 			{fcond} {mcond}
 		order by
 			`tabWarehouse`.name desc
diff --git a/erpnext/projects/doctype/task/task.py b/erpnext/projects/doctype/task/task.py
index ebe38af..b341325 100755
--- a/erpnext/projects/doctype/task/task.py
+++ b/erpnext/projects/doctype/task/task.py
@@ -163,7 +163,7 @@
 def get_project(doctype, txt, searchfield, start, page_len, filters):
 	from erpnext.controllers.queries import get_match_cond
 	return frappe.db.sql(""" select name from `tabProject`
-			where %(key)s like "%(txt)s"
+			where %(key)s like %(txt)s
 				%(mcond)s
 			order by name
 			limit %(start)s, %(page_len)s """ % {'key': searchfield,
diff --git a/erpnext/selling/doctype/customer/customer.py b/erpnext/selling/doctype/customer/customer.py
index d285704..16dac28 100644
--- a/erpnext/selling/doctype/customer/customer.py
+++ b/erpnext/selling/doctype/customer/customer.py
@@ -91,7 +91,7 @@
 	def update_customer_groups(self):
 		ignore_doctypes = ["Lead", "Opportunity", "POS Profile", "Tax Rule", "Pricing Rule"]
 		if frappe.flags.customer_group_changed:
-			update_linked_doctypes('Customer', frappe.db.escape(self.name), 'Customer Group',
+			update_linked_doctypes('Customer', self.name, 'Customer Group',
 				self.customer_group, ignore_doctypes)
 
 	def create_primary_contact(self):