diff --git a/addons/account/report/account_journal.py b/addons/account/report/account_journal.py
index 9f050756a5e..9d62829ef93 100644
--- a/addons/account/report/account_journal.py
+++ b/addons/account/report/account_journal.py
@@ -114,8 +114,7 @@ class journal_print(report_sxw.rml_parse, common_report_header):
             journal_id = [journal_id]
         obj_mline = self.pool.get('account.move.line')
         self.cr.execute('update account_journal_period set state=%s where journal_id IN %s and period_id=%s and state=%s', ('printed', self.journal_ids, period_id, 'draft'))
-        self.cr.commit()
-        
+
         move_state = ['draft','posted']
         if self.target_move == 'posted':
             move_state = ['posted']
@@ -158,4 +157,4 @@ class journal_print(report_sxw.rml_parse, common_report_header):
 
 report_sxw.report_sxw('report.account.journal.period.print', 'account.journal.period', 'addons/account/report/account_journal.rml', parser=journal_print, header='internal')
 
-# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
\ No newline at end of file
+# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
diff --git a/addons/account/test/account_change_currency.yml b/addons/account/test/account_change_currency.yml
index d99c9002870..71a4ff6e301 100644
--- a/addons/account/test/account_change_currency.yml
+++ b/addons/account/test/account_change_currency.yml
@@ -41,17 +41,14 @@
   I clicked on Change Currency button to change the currency
 -
   !python {model: account.change.currency}: |
-    try:
-       self.view_init(cr, uid, [ref("account_change_currency_0")], {"lang": 'en_US',
+    self.view_init(cr, uid, [ref("account_change_currency_0")], {"lang": 'en_US',
       "active_model": "account.invoice", "tz": False, "record_id": 4, "active_ids":
       [ref("account_invoice_currency")], "type": "out_invoice", "active_id": ref("account_invoice_currency"),
-      })
-       self.change_currency(cr, uid, [ref("account_change_currency_0")], {"lang": 'en_US',
+    })
+    self.change_currency(cr, uid, [ref("account_change_currency_0")], {"lang": 'en_US',
       "active_model": "account.invoice", "tz": False, "record_id": 4, "active_ids":
       [ref("account_invoice_currency")], "type": "out_invoice", "active_id": ref("account_invoice_currency"),
-      })
-    except:
-       print "You can not change currency for Open Invoice !"
+    })
 -
   I can't change the currency of invoice when it is not in draft state so i change the state to cancel
 -
diff --git a/addons/account/test/account_report.yml b/addons/account/test/account_report.yml
index 0048de7af46..a02635d0fc1 100644
--- a/addons/account/test/account_report.yml
+++ b/addons/account/test/account_report.yml
@@ -143,7 +143,6 @@
     (data, format) = netsvc.LocalService('report.account.account.balance').create(cr, uid, [ref('account.bal'),ref('account.gpf')], data_dict, {'periods': []})
     if tools.config['test_report_directory']:
        file(os.path.join(tools.config['test_report_directory'], 'account-account_balance-normal.'+format), 'wb+').write(data)
-    print "Account Balance Report in Normal mode - From Menu"
     
     data_dict.update({'model': 'ir.ui.menu'})
     data_dict['form'].update({'active_ids':[ref('account.bal'),ref('account.gpf')]})
@@ -174,7 +173,6 @@
     if tools.config['test_report_directory']:
        file(os.path.join(tools.config['test_report_directory'], 'account-central_journal.'+format), 'wb+').write(data)
        
-    print "Central Journal Report - From Menu"
     data_dict.update({'model': 'ir.ui.menu'})
     data_dict['form'].update({'active_ids':journal_period_ids})
     
@@ -226,7 +224,6 @@
     if tools.config['test_report_directory']:
        file(os.path.join(tools.config['test_report_directory'], 'account-general_ledger.'+format), 'wb+').write(data)
 
-    print "GL report from menu"
     data_dict.update({'model': 'ir.ui.menu'})
     data_dict['form'].update({'active_ids': acc_ids})
     (data, format) = netsvc.LocalService('report.account.general.ledger').create(cr, uid, [], data_dict, {})
@@ -255,7 +252,6 @@
     if tools.config['test_report_directory']:
        file(os.path.join(tools.config['test_report_directory'], 'account-general_ledger-landscape.'+format), 'wb+').write(data)
 
-    print "GL report landscape mode from menu"
     data_dict.update({'model': 'ir.ui.menu'})
     data_dict['form'].update({'active_ids': acc_ids})
     (data, format) = netsvc.LocalService('report.account.general.ledger_landscape').create(cr, uid, [], data_dict, {})
@@ -285,7 +281,6 @@
     if tools.config['test_report_directory']:
        file(os.path.join(tools.config['test_report_directory'], 'account-print_journal.'+format), 'wb+').write(data)
        
-    print "Journal Report - From Menu"
     data_dict.update({'model': 'ir.ui.menu'})
     data_dict['form'].update({'active_ids':journal_period_ids})
     
diff --git a/addons/account/test/test_parent_structure.py b/addons/account/test/test_parent_structure.py
index ba27d91c87c..9c3dd2b4c47 100644
--- a/addons/account/test/test_parent_structure.py
+++ b/addons/account/test/test_parent_structure.py
@@ -47,8 +47,3 @@ for a in account_lists:
             (a2['parent_right']<a['parent_right']))
         if a2['parent_id']==a['id']:
             assert (a2['parent_left']>a['parent_left']) and (a2['parent_right']<a['parent_right'])
-
-print 'Tests Ok'
-
-
-
diff --git a/addons/decimal_precision/decimal_precision.py b/addons/decimal_precision/decimal_precision.py
index 6a0f8ffa424..4077a019ee2 100644
--- a/addons/decimal_precision/decimal_precision.py
+++ b/addons/decimal_precision/decimal_precision.py
@@ -45,12 +45,12 @@ class decimal_precision(osv.osv):
         return res and res[0] or 2
 
     def write(self, cr, uid, ids, data, *args, **argv):
-        self.precision_get.clear_cache(cr.dbname)
         res = super(decimal_precision, self).write(cr, uid, ids, data, *args, **argv)
         for obj in self.pool.obj_list():
             for colname,col in self.pool.get(obj)._columns.items():
                 if isinstance(col, fields.float):
                     col.digits_change(cr)
+        self.precision_get.clear_cache(cr.dbname)
         return res
 
 decimal_precision()
diff --git a/addons/hr_holidays/hr_holidays.py b/addons/hr_holidays/hr_holidays.py
index b5f4534454f..487de83ebf4 100644
--- a/addons/hr_holidays/hr_holidays.py
+++ b/addons/hr_holidays/hr_holidays.py
@@ -23,11 +23,14 @@
 
 import time
 import datetime
+from itertools import groupby
+from operator import itemgetter
 
 import netsvc
 from osv import fields, osv
 from tools.translate import _
 
+
 class hr_holidays_status(osv.osv):
     _name = "hr.holidays.status"
     _description = "Leave Type"
@@ -35,39 +38,51 @@ class hr_holidays_status(osv.osv):
     def get_days_cat(self, cr, uid, ids, category_id, return_false, context=None):
         if context is None:
             context = {}
+
+        cr.execute("""SELECT id, type, number_of_days, holiday_status_id FROM hr_holidays WHERE category_id = %s AND state='validate' AND holiday_status_id in %s""",
+            [category_id, tuple(ids)])
+        result = sorted(cr.dictfetchall(), key=lambda x: x['holiday_status_id'])
+
+        grouped_lines = dict((k, [v for v in itr]) for k, itr in groupby(result, itemgetter('holiday_status_id')))
+
         res = {}
         for record in self.browse(cr, uid, ids, context=context):
             res[record.id] = {}
             max_leaves = leaves_taken = 0
             if not return_false:
-                cr.execute("""SELECT type, sum(number_of_days) FROM hr_holidays WHERE category_id = %s AND state='validate' AND holiday_status_id = %s GROUP BY type""", (str(category_id), str(record.id)))
-                for line in cr.fetchall():
-                    if line[0] =='remove':
-                        leaves_taken = -line[1]
-                    if line[0] =='add':
-                        max_leaves = line[1]
+                if record.id in grouped_lines:
+                    leaves_taken = -sum([item['number_of_days'] for item in grouped_lines[record.id] if item['type'] == 'remove'])
+                    max_leaves = sum([item['number_of_days'] for item in grouped_lines[record.id] if item['type'] == 'add'])
+
             res[record.id]['max_leaves'] = max_leaves
             res[record.id]['leaves_taken'] = leaves_taken
             res[record.id]['remaining_leaves'] = max_leaves - leaves_taken
+
         return res
 
     def get_days(self, cr, uid, ids, employee_id, return_false, context=None):
         if context is None:
             context = {}
+
+        cr.execute("""SELECT id, type, number_of_days, holiday_status_id FROM hr_holidays WHERE employee_id = %s AND state='validate' AND holiday_status_id in %s""",
+            [employee_id, tuple(ids)])
+        result = sorted(cr.dictfetchall(), key=lambda x: x['holiday_status_id'])
+
+        grouped_lines = dict((k, [v for v in itr]) for k, itr in groupby(result, itemgetter('holiday_status_id')))
+
         res = {}
         for record in self.browse(cr, uid, ids, context=context):
             res[record.id] = {}
             max_leaves = leaves_taken = 0
             if not return_false:
-                cr.execute("""SELECT type, sum(number_of_days) FROM hr_holidays WHERE employee_id = %s AND state='validate' AND holiday_status_id = %s GROUP BY type""", (str(employee_id), str(record.id)))
-                for line in cr.fetchall():
-                    if line[0] =='remove':
-                        leaves_taken = -line[1]
-                    if line[0] =='add':
-                        max_leaves = line[1]
+                if record.id in grouped_lines:
+                    leaves_taken = -sum([item['number_of_days'] for item in grouped_lines[record.id] if item['type'] == 'remove'])
+                    max_leaves = sum([item['number_of_days'] for item in grouped_lines[record.id] if item['type'] == 'add'])
+
             res[record.id]['max_leaves'] = max_leaves
             res[record.id]['leaves_taken'] = leaves_taken
             res[record.id]['remaining_leaves'] = max_leaves - leaves_taken
+
         return res
 
     def _user_left_days(self, cr, uid, ids, name, args, context=None):
diff --git a/addons/hr_timesheet_sheet/hr_timesheet_sheet.py b/addons/hr_timesheet_sheet/hr_timesheet_sheet.py
index a4049242c22..55e25e4001c 100644
--- a/addons/hr_timesheet_sheet/hr_timesheet_sheet.py
+++ b/addons/hr_timesheet_sheet/hr_timesheet_sheet.py
@@ -34,8 +34,6 @@ class one2many_mod2(fields.one2many):
         if values is None:
             values = {}
 
-        res = {}.fromkeys(ids, [])
-
         # dict:
         # {idn: (date_current, user_id), ...
         #  1: ('2010-08-15', 1)}
@@ -59,9 +57,13 @@ class one2many_mod2(fields.one2many):
 
         ids2 = obj.pool.get(self._obj).search(cr, user, dom, limit=self._limit)
 
+        res = {}
+        for i in ids:
+            res[i] = []
+
         for r in obj.pool.get(self._obj)._read_flat(cr, user, ids2, [self._fields_id], context=context, load='_classic_write'):
             if r[self._fields_id]:
-                res.setdefault(r[self._fields_id][0], []).append(r['id'])
+                res[r[self._fields_id][0]].append(r['id'])
 
         return res
 
@@ -82,7 +84,6 @@ class one2many_mod(fields.one2many):
         if values is None:
             values = {}
 
-        res = {}.fromkeys(ids, [])
 
         res5 = obj.read(cr, user, ids, ['date_current', 'user_id'], context=context)
         res6 = {}
@@ -96,11 +97,13 @@ class one2many_mod(fields.one2many):
                 dom = [('date', '=', res6[id][0]), ('user_id', '=', res6[id][1])]
             ids2.extend(obj.pool.get(self._obj).search(cr, user,
                 dom, limit=self._limit))
-
+        res = {}
+        for i in ids:
+            res[i] = []
         for r in obj.pool.get(self._obj)._read_flat(cr, user, ids2,
                 [self._fields_id], context=context, load='_classic_write'):
             if r[self._fields_id]:
-                res.setdefault(r[self._fields_id][0], []).append(r['id'])
+                res[r[self._fields_id][0]].append(r['id'])
 
         return res
 
diff --git a/addons/mrp/mrp.py b/addons/mrp/mrp.py
index 87dfe8dd670..33828840eeb 100644
--- a/addons/mrp/mrp.py
+++ b/addons/mrp/mrp.py
@@ -357,7 +357,9 @@ class many2many_domain(fields.many2many):
             context = {}
 
         move_obj = obj.pool.get('stock.move')
-        res = {}.fromkeys(ids, [])
+        res = {}
+        for i in ids:
+            res[i] = []
         valid_move_ids = move_obj.search(cr, user, self._domain) # move ids relative to domain argument
         cr.execute("SELECT production_id, move_id from mrp_production_move_ids where production_id in %s and move_id in %s",
             [tuple(ids), tuple(valid_move_ids)])
@@ -377,7 +379,9 @@ class one2many_domain(fields.one2many):
             context = {}
 
         move_obj = obj.pool.get('stock.move')
-        res = {}.fromkeys(ids, [])
+        res = {}
+        for i in ids:
+            res[i] = []
         move_ids = move_obj.search(cr, user, self._domain+[('production_id', 'in', tuple(ids))], context=context)
         related_move_dict = dict([(o.production_id.id, [o.id]) for o in move_obj.browse(cr, user, move_ids, context=context)])
         res.update(related_move_dict)