diff --git a/addons/account/wizard/account_invoice_state.py b/addons/account/wizard/account_invoice_state.py
index 6b1a41f49af..c3934e38db0 100644
--- a/addons/account/wizard/account_invoice_state.py
+++ b/addons/account/wizard/account_invoice_state.py
@@ -21,6 +21,7 @@
 from osv import fields, osv
 from tools.translate import _
 import netsvc
+import pooler
 
 class account_invoice_confirm(osv.osv_memory):
     """
@@ -34,7 +35,12 @@ class account_invoice_confirm(osv.osv_memory):
         wf_service = netsvc.LocalService('workflow')
         if context is None:
             context = {}
-        for id in context['active_ids']:
+        pool_obj = pooler.get_pool(cr.dbname)
+        data_inv = pool_obj.get('account.invoice').read(cr, uid, context['active_ids'], ['state'], context=context)
+        
+        for record in data_inv:
+            if record['state'] not in ('draft','proforma','proforma2'):
+                raise osv.except_osv(_('Warning'), _("Selected Invoice(s) cannot be confirmed as they are not in 'Draft' or 'Pro-Forma' state!"))
             wf_service.trg_validate(uid, 'account.invoice', id, 'invoice_open', cr)
         return {}
 
@@ -47,14 +53,19 @@ class account_invoice_cancel(osv.osv_memory):
     """
 
     _name = "account.invoice.cancel"
-    _description = "Cancel the selected invoices"
+    _description = "Cancel the Selected Invoices"
 
     def invoice_cancel(self, cr, uid, ids, context=None):
-        wf_service = netsvc.LocalService('workflow')
         if context is None:
             context = {}
-        for id in context['active_ids']:
-            wf_service.trg_validate(uid, 'account.invoice', id, 'invoice_cancel', cr)
+        wf_service = netsvc.LocalService('workflow')
+        pool_obj = pooler.get_pool(cr.dbname)
+        data_inv = pool_obj.get('account.invoice').read(cr, uid, context['active_ids'], ['state'], context=context)
+        
+        for record in data_inv:
+            if record['state'] in ('cancel','paid'):
+                raise osv.except_osv(_('Warning'), _("Selected Invoice(s) cannot be cancelled as they are already in 'Cancelled' or 'Done' state!"))
+            wf_service.trg_validate(uid, 'account.invoice', record['id'], 'invoice_cancel', cr)
         return {}
 
 account_invoice_cancel()
diff --git a/addons/account/wizard/account_invoice_state_view.xml b/addons/account/wizard/account_invoice_state_view.xml
index 8748edbb688..d83c0c6f2dc 100644
--- a/addons/account/wizard/account_invoice_state_view.xml
+++ b/addons/account/wizard/account_invoice_state_view.xml
@@ -6,10 +6,10 @@
             <field name="model">account.invoice.confirm</field>
             <field name="type">form</field>
             <field name="arch" type="xml">
-			<form string="Confirm draft invoices">
-			    <separator string="Confirm draft invoices" colspan="4"/>
+			<form string="Confirm Draft Invoices">
+			    <separator string="Confirm Draft Invoices" colspan="4"/>
                     <group colspan="4" col="6">
-                    	<button icon="gtk-cancel" special="cancel" string="Cancel"/>
+                    	<button icon="gtk-cancel" special="cancel" string="Close"/>
                     	<button icon="gtk-execute" string="Confirm Invoices" name="invoice_confirm" type="object" default_focus="1"/>
                    </group>
                </form>
@@ -17,7 +17,7 @@
     	</record>
 
 		<record id="action_account_invoice_confirm" model="ir.actions.act_window">
-            <field name="name">Confirm draft invoices</field>
+            <field name="name">Confirm Draft Invoices</field>
             <field name="res_model">account.invoice.confirm</field>
             <field name="view_type">form</field>
             <field name="view_mode">form</field>
@@ -28,7 +28,7 @@
 		<record model="ir.values" id="action_account_invoice_confirm_values">
             <field name="model_id" ref="account.model_account_invoice" />
             <field name="object" eval="1" />
-            <field name="name">Confirm draft invoices</field>
+            <field name="name">Confirm Draft Invoices</field>
             <field name="key2">client_action_multi</field>
             <field name="value" eval="'ir.actions.act_window,' +str(ref('action_account_invoice_confirm'))" />
             <field name="key">action</field>
@@ -40,18 +40,18 @@
             <field name="model">account.invoice.cancel</field>
             <field name="type">form</field>
             <field name="arch" type="xml">
-			<form string="Cancel selected invoices">
-			    <separator string="Cancel selected invoices" colspan="4"/>
+			<form string="Cancel Selected Invoices">
+			    <separator string="Cancel Selected Invoices" colspan="4"/>
                     <group colspan="4" col="6">
-                    	<button icon="gtk-cancel" special="cancel" string="Cancel"/>
-                    	<button icon="gtk-execute" string="Cancel selected invoices" name="invoice_cancel" type="object" default_focus="1"/>
+                    	<button icon="gtk-cancel" special="cancel" string="Close"/>
+                    	<button icon="gtk-execute" string="Cancel Invoices" name="invoice_cancel" type="object" default_focus="1"/>
                    </group>
                </form>
             </field>
     	</record>
 
 		<record id="action_account_invoice_cancel" model="ir.actions.act_window">
-            <field name="name">Cancel selected invoices</field>
+            <field name="name">Cancel Selected Invoices</field>
             <field name="res_model">account.invoice.cancel</field>
             <field name="view_type">form</field>
             <field name="view_mode">form</field>
@@ -62,7 +62,7 @@
 		<record model="ir.values" id="action_account_invoice_cancel_values">
             <field name="model_id" ref="account.model_account_invoice" />
             <field name="object" eval="1" />
-            <field name="name">Cancel selected invoices</field>
+            <field name="name">Cancel Selected Invoices</field>
             <field name="key2">client_action_multi</field>
             <field name="value" eval="'ir.actions.act_window,' +str(ref('action_account_invoice_cancel'))" />
             <field name="key">action</field>
diff --git a/addons/point_of_sale/__init__.py b/addons/point_of_sale/__init__.py
index 8b041be5801..31c55fc965f 100644
--- a/addons/point_of_sale/__init__.py
+++ b/addons/point_of_sale/__init__.py
@@ -26,7 +26,5 @@ import stock
 import wizard
 import report
 
-
-
 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
 
diff --git a/addons/point_of_sale/pos.py b/addons/point_of_sale/pos.py
index a59ae6e9d5b..8b31c3348d3 100644
--- a/addons/point_of_sale/pos.py
+++ b/addons/point_of_sale/pos.py
@@ -287,7 +287,7 @@ class pos_order(osv.osv):
         'date_payment': fields.function(_get_date_payment2, method=True, string='Payment Date', type='date',  store=True),
         'date_validity': fields.date('Validity Date', required=True),
         'user_id': fields.many2one('res.users', 'Connected Salesman', readonly=True),
-        'user_saleman': fields.many2one('res.users', 'Salesman', required=True),
+        'user_salesman_id': fields.many2one('res.users', 'Salesman', required=True),
         'sale_manager': fields.many2one('res.users', 'Salesman Manager'),
         'amount_tax': fields.function(_amount_all, method=True, string='Taxes',digits_compute=dp.get_precision('Point Of Sale'), multi='all'),
         'amount_total': fields.function(_amount_total, method=True, string='Total'),
@@ -702,7 +702,7 @@ class pos_order(osv.osv):
         inv_ids = []
 
         for order in self.browse(cr, uid, ids, context):
-            curr_c = order.user_saleman.company_id
+            curr_c = order.user_salesman_id.company_id
             if order.invoice_id:
                 inv_ids.append(order.invoice_id.id)
                 continue
@@ -979,8 +979,8 @@ class pos_order(osv.osv):
                     create_contract_nb = True
                     break
             if create_contract_nb:
-                seq = sequence_obj.get(cr, uid, 'pos.user_%s' % pos.user_saleman.login)
-                vals['contract_number'] ='%s-%s' % (pos.user_saleman.login, seq)
+                seq = sequence_obj.get(cr, uid, 'pos.user_%s' % pos.user_salesman_id.login)
+                vals['contract_number'] ='%s-%s' % (pos.user_salesman_id.login, seq)
         self.write(cr, uid, ids, vals)
 
     def action_paid(self, cr, uid, ids, context=None):
@@ -1322,4 +1322,4 @@ class product_product(osv.osv):
         'disc_controle': lambda *a: True,
 }
 product_product()
-# 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/point_of_sale/pos_demo.xml b/addons/point_of_sale/pos_demo.xml
index f3573abc791..b75f4362578 100644
--- a/addons/point_of_sale/pos_demo.xml
+++ b/addons/point_of_sale/pos_demo.xml
@@ -57,7 +57,7 @@
 			<field name="shop_id" ref="sale.shop"/>
 			<field eval="&quot;&quot;&quot;2009-05-29&quot;&quot;&quot;" name="date_order"/>
 			<field name="partner_id" ref="base.res_partner_5"/>
-			<field name="user_saleman" ref="base.user_root"/>
+			<field name="user_salesman_id" ref="base.user_root"/>
 			<field name="sale_manager" ref="base.user_root"/>
 			<field eval="&quot;&quot;&quot;POS/001&quot;&quot;&quot;" name="name"/>
 			<field name="company_id" ref="res_company_tinyshop0"/>
@@ -93,7 +93,7 @@
       <field name="shop_id" ref="sale.shop"/>
 			<field eval="&quot;&quot;&quot;2009-05-29&quot;&quot;&quot;" name="date_order"/>
 			<field name="partner_id" ref="base.res_partner_3"/>
-			<field name="user_saleman" ref="res_users_sofia0"/>
+			<field name="user_salesman_id" ref="res_users_sofia0"/>
 			<field name="sale_manager" ref="base.user_root"/>
 			<field eval="&quot;&quot;&quot;POS/002&quot;&quot;&quot;" name="name"/>
 			<field name="company_id" ref="res_company_shop0"/>
@@ -135,7 +135,7 @@
 			<field eval="&quot;&quot;&quot;2009-11-29&quot;&quot;&quot;" name="date_validity"/>
 			<field eval="&quot;&quot;&quot;2009-05-29&quot;&quot;&quot;" name="date_order"/>
 			<field name="partner_id" ref="base.res_partner_3"/>
-			<field name="user_saleman" ref="res_users_sofia0"/>
+			<field name="user_salesman_id" ref="res_users_sofia0"/>
 			<field name="sale_manager" ref="base.user_root"/>
 			<field eval="&quot;&quot;&quot;POS/0012&quot;&quot;&quot;" name="name"/>
 			<field name="company_id" ref="res_company_shop0"/>
diff --git a/addons/point_of_sale/pos_view.xml b/addons/point_of_sale/pos_view.xml
index f32c23b92ff..4958afc82fd 100644
--- a/addons/point_of_sale/pos_view.xml
+++ b/addons/point_of_sale/pos_view.xml
@@ -11,7 +11,7 @@
                     <notebook >
                         <page string="Order lines">
                             <group colspan="4" col="6">
-                                <field name="user_saleman" />
+                                <field name="user_salesman_id" />
                                 <field name="partner_id" on_change="onchange_partner_pricelist(partner_id)"/>
                                 <field name="contract_number" select="1" groups="base.group_extended"/>
                             </group>
diff --git a/addons/point_of_sale/report/pos_receipt.rml b/addons/point_of_sale/report/pos_receipt.rml
index 807d9e497d6..d615fc74534 100644
--- a/addons/point_of_sale/report/pos_receipt.rml
+++ b/addons/point_of_sale/report/pos_receipt.rml
@@ -103,7 +103,7 @@
         <para style="terp_default_Centre_9">Tel : [[ address and address.phone ]]</para>
         <para style="terp_default_Centre_9">E-mail : [[ address and address.email ]]</para>
         <para style="terp_default_Centre_9">Shop : [[ o.shop_id.name ]]</para>
-        <para style="terp_default_Centre_9">Vendeur : [[ o.user_saleman.name ]]</para>
+        <para style="terp_default_Centre_9">Vendeur : [[ o.user_salesman_id.name ]]</para>
         <para style="terp_default_Centre_9">Date : [[ formatLang(o.date_order,date = True) ]]</para>
         <para style="P4">
             <font color="white"> </font>