diff --git a/frappe/__init__.py b/frappe/__init__.py
index 1e5b7a1602..4623ed438b 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -107,6 +107,7 @@ def init(site, sites_path=None):
 
 	local.user = None
 	local.role_permissions = {}
+	local.valid_columns = {}
 
 	local.jenv = None
 	local.jloader =None
diff --git a/frappe/commands.py b/frappe/commands.py
index a6f8bb02a3..eaffa36034 100644
--- a/frappe/commands.py
+++ b/frappe/commands.py
@@ -30,7 +30,8 @@ def pass_context(f):
 		if profile:
 			pr.disable()
 			s = StringIO.StringIO()
-			ps = pstats.Stats(pr, stream=s).sort_stats('tottime', 'ncalls')
+			ps = pstats.Stats(pr, stream=s)\
+				.sort_stats('cumtime', 'tottime', 'ncalls')
 			ps.print_stats()
 			print s.getvalue()
 
@@ -72,8 +73,12 @@ def _new_site(db_name, site, mariadb_root_username=None, mariadb_root_password=N
 	import frappe.utils.scheduler
 
 	frappe.init(site=site)
-	# enable scheduler post install?
-	enable_scheduler = _is_scheduler_enabled()
+
+	try:
+		# enable scheduler post install?
+		enable_scheduler = _is_scheduler_enabled()
+	except:
+		enable_scheduler = False
 
 	install_db(root_login=mariadb_root_username, root_password=mariadb_root_password, db_name=db_name, admin_password=admin_password, verbose=verbose, source_sql=source_sql,force=force, reinstall=reinstall)
 	make_site_dirs()
@@ -132,7 +137,7 @@ def reinstall(context):
 		frappe.clear_cache()
 		installed = frappe.get_installed_apps()
 		frappe.clear_cache()
-	except:
+	except Exception, e:
 		installed = []
 		raise
 	finally:
diff --git a/frappe/database.py b/frappe/database.py
index 416d7b205d..73181f1ed3 100644
--- a/frappe/database.py
+++ b/frappe/database.py
@@ -247,6 +247,8 @@ class Database:
 
 	def convert_to_simple_type(self, v, formatted=0):
 		"""Format date, time, longint values."""
+		return v
+
 		from frappe.utils import formatdate, fmt_money
 
 		if isinstance(v, (datetime.date, datetime.timedelta, datetime.datetime, long)):
diff --git a/frappe/geo/doctype/currency/currency.py b/frappe/geo/doctype/currency/currency.py
index f56715937a..688303fd50 100644
--- a/frappe/geo/doctype/currency/currency.py
+++ b/frappe/geo/doctype/currency/currency.py
@@ -9,4 +9,5 @@ from frappe.model.document import Document
 
 class Currency(Document):
 	def validate(self):
-		frappe.clear_cache()
+		if not frappe.flags.in_install_app:
+			frappe.clear_cache()
diff --git a/frappe/installer.py b/frappe/installer.py
index 920aa939fd..149565daf9 100755
--- a/frappe/installer.py
+++ b/frappe/installer.py
@@ -88,6 +88,7 @@ def make_connection(root_login, root_password):
 	return frappe.database.Database(user=root_login, password=root_password)
 
 def install_app(name, verbose=False, set_as_patched=True):
+	frappe.clear_cache()
 	app_hooks = frappe.get_hooks(app_name=name)
 	installed_apps = frappe.get_installed_apps()
 
diff --git a/frappe/model/base_document.py b/frappe/model/base_document.py
index 4039f63647..c41601da09 100644
--- a/frappe/model/base_document.py
+++ b/frappe/model/base_document.py
@@ -179,16 +179,22 @@ class BaseDocument(object):
 			if key not in self.__dict__:
 				self.__dict__[key] = None
 
-		if self.doctype in ("DocField", "DocPerm") and self.parent in ("DocType", "DocField", "DocPerm"):
-			from frappe.model.meta import get_table_columns
-			valid = get_table_columns(self.doctype)
-		else:
-			valid = self.meta.get_valid_columns()
-
-		for key in valid:
+		for key in self.get_valid_columns():
 			if key not in self.__dict__:
 				self.__dict__[key] = None
 
+	def get_valid_columns(self):
+		if self.doctype not in frappe.local.valid_columns:
+			if self.doctype in ("DocField", "DocPerm") and self.parent in ("DocType", "DocField", "DocPerm"):
+				from frappe.model.meta import get_table_columns
+				valid = get_table_columns(self.doctype)
+			else:
+				valid = self.meta.get_valid_columns()
+
+			frappe.local.valid_columns[self.doctype] = valid
+
+		return frappe.local.valid_columns[self.doctype]
+
 	def is_new(self):
 		return self.get("__islocal")
 
diff --git a/frappe/model/meta.py b/frappe/model/meta.py
index 79f54a54eb..89859a1a97 100644
--- a/frappe/model/meta.py
+++ b/frappe/model/meta.py
@@ -124,6 +124,7 @@ class Meta(Document):
 		self.add_custom_fields()
 		self.apply_property_setters()
 		self.sort_fields()
+		self.get_valid_columns()
 
 	def add_custom_fields(self):
 		try:
diff --git a/frappe/utils/install.py b/frappe/utils/install.py
index b499e084a6..204638e11a 100644
--- a/frappe/utils/install.py
+++ b/frappe/utils/install.py
@@ -107,7 +107,7 @@ def add_country_and_currency(name, country):
 			"code": country.code,
 			"date_format": country.date_format or "dd-mm-yyyy",
 			"time_zones": "\n".join(country.timezones or [])
-		}).insert()
+		}).db_insert()
 
 	if country.currency and not frappe.db.exists("Currency", country.currency):
 		frappe.get_doc({
@@ -117,5 +117,5 @@ def add_country_and_currency(name, country):
 			"symbol": country.currency_symbol,
 			"fraction_units": country.currency_fraction_units,
 			"number_format": country.number_format
-		}).insert()
+		}).db_insert()
 
diff --git a/frappe/utils/redis_wrapper.py b/frappe/utils/redis_wrapper.py
index 1548868cd5..4c14ca0f34 100644
--- a/frappe/utils/redis_wrapper.py
+++ b/frappe/utils/redis_wrapper.py
@@ -35,9 +35,9 @@ class RedisWrapper(redis.Redis):
 		:param generator: Function to be called to generate a value if `None` is returned."""
 		original_key = key
 		key = self.make_key(key, user)
-		val = frappe.local.cache.get(key)
 
-		if val is None:
+		if key not in frappe.local.cache:
+			val = None
 			if not frappe.local.flags.in_install:
 				try:
 					val = self.get(key)
@@ -50,7 +50,8 @@ class RedisWrapper(redis.Redis):
 				self.set_value(original_key, val, user=user)
 			else:
 				frappe.local.cache[key] = val
-		return val
+
+		return frappe.local.cache.get(key)
 
 	def get_all(self, key):
 		ret = {}