diff --git a/py/webnotes/model/db_schema.py b/py/webnotes/model/db_schema.py
index e1e02058d2..eb9f73f36f 100644
--- a/py/webnotes/model/db_schema.py
+++ b/py/webnotes/model/db_schema.py
@@ -357,8 +357,11 @@ class DbManager:
 		mysql_path = getattr(webnotes.defs, 'mysql_path', None)
 		mysql = mysql_path and os.path.join(mysql_path, 'mysql') or 'mysql'
 		
+		from webnotes.utils import make_esc
+		esc = make_esc('$ ')
+		
 		try:
-			ret = os.system("%s -u root -p%s %s < %s"%(mysql, root_password.replace(" ", "\ "), target.replace("$", "\$"), source))
+			ret = os.system("%s -u root -p%s %s < %s"%(mysql, esc(root_password), esc(target), source))
 		except Exception,e:
 			raise e
 
diff --git a/py/webnotes/utils/__init__.py b/py/webnotes/utils/__init__.py
index 6e342f1802..b3d044d7dd 100644
--- a/py/webnotes/utils/__init__.py
+++ b/py/webnotes/utils/__init__.py
@@ -636,6 +636,10 @@ def get_file_timestamp(fn):
 		else:
 			return None
 
-
+def make_esc(esc_chars):
+	"""
+		Function generator for Escaping special characters
+	"""
+	return lambda s: ''.join(['\\' + c if c in esc_chars else c for c in s])
 	
 
diff --git a/py/webnotes/utils/backups.py b/py/webnotes/utils/backups.py
index 26e1f98771..5c74ffe618 100644
--- a/py/webnotes/utils/backups.py
+++ b/py/webnotes/utils/backups.py
@@ -24,11 +24,11 @@ class BackupGenerator:
 		If specifying db_file_name, also append ".sql.gz"
 	"""
 	def __init__(self, db_name, user, password, db_file_name=None):
-		self.db_name = db_name
+		self.db_name = db_name.replace('$', '\$')
 		self.user = user
 		self.password = password
 		self.db_file_name = db_file_name and db_file_name \
-							or (os.path.join(backup_path, db_name + ".sql.gz"))
+							or (os.path.join(backup_path, self.db_name + ".sql.gz"))
 
 	def take_dump(self):
 		"""
@@ -88,7 +88,7 @@ class BackupGenerator:
 		 Also, a new backup will be available for download (if requested)\
 		  only after 24 hours.""" % {"file_url":file_url}
 		
-		datetime_str = datetime.fromtimestamp(os.stat(self.db_file_name).st_ctime)
+		datetime_str = datetime.fromtimestamp(os.stat(self.db_file_name.replace('\$', '$')).st_ctime)
 		
 		subject = datetime_str.strftime("%d/%m/%Y %H:%M:%S") + """ - Backup ready to be downloaded"""
 		sendmail(recipients=recipient_list, msg=msg, subject=subject)
diff --git a/py/webnotes/utils/nestedset.py b/py/webnotes/utils/nestedset.py
index 9a3a4da892..ecc1418bc1 100644
--- a/py/webnotes/utils/nestedset.py
+++ b/py/webnotes/utils/nestedset.py
@@ -156,8 +156,10 @@ def rebuild_tree(doctype, parent_field):
 	result = webnotes.conn.sql("SELECT name FROM `tab%s` WHERE `%s`='' or `%s` IS NULL ORDER BY name ASC" % (doctype, parent_field, parent_field))
 	for r in result:
 		right = rebuild_node(doctype, r[0], right, parent_field)
+		webnotes.conn.sql("commit")
+		webnotes.conn.sql("start transaction")
 		
-def rebuild_node(doctype, parent, left, parent_field):
+def rebuild_node(doctype, parent, left, parent_field, cnt = 0):
 	"""
 		reset lft, rgt and recursive call for all children
 	"""
@@ -165,17 +167,24 @@ def rebuild_node(doctype, parent, left, parent_field):
 	n = now()
 	
 	# the right value of this node is the left value + 1
-	right = left+1
+	right = left+1	
 
 	# get all children of this node
 	result = webnotes.conn.sql("SELECT name FROM `tab%s` WHERE `%s`='%s'" % (doctype, parent_field, parent))
 	for r in result:
-		right = rebuild_node(doctype, r[0], right, parent_field)
+		right = rebuild_node(doctype, r[0], right, parent_field, cnt)
 
 	# we've got the left value, and now that we've processed
 	# the children of this node we also know the right value
 	webnotes.conn.sql("UPDATE `tab%s` SET lft=%s, rgt=%s, modified='%s' WHERE name='%s'" % (doctype,left,right,n,parent))
 
+	# commit after every 100
+	cnt += 1
+	if cnt % 100 == 0:
+		cnt = 0
+		webnotes.conn.sql("commit")
+		webnotes.conn.sql("start transaction")
+
 	#return the right value of this node + 1
 	return right+1
 	
@@ -220,4 +229,3 @@ def update_remove_node(doctype, name):
 		# update all on the right
 		webnotes.conn.sql("update `tab%s` set rgt = rgt-2, modified='%s' where rgt > %s" %(doctype,n,left[0][0]))
 		webnotes.conn.sql("update `tab%s` set lft = lft-2, modified='%s' where lft > %s" %(doctype,n,left[0][0]))
-