diff --git a/orchestra/contrib/bills/admin.py b/orchestra/contrib/bills/admin.py
index 4c5c55fb..10301e09 100644
--- a/orchestra/contrib/bills/admin.py
+++ b/orchestra/contrib/bills/admin.py
@@ -4,7 +4,7 @@ from django.contrib import admin, messages
 from django.contrib.admin.utils import unquote
 from django.core.urlresolvers import reverse
 from django.db import models
-from django.db.models import F, Sum
+from django.db.models import F, Sum, Prefetch
 from django.db.models.functions import Coalesce
 from django.templatetags.static import static
 from django.utils.safestring import mark_safe
@@ -17,8 +17,10 @@ from orchestra.contrib.accounts.admin import AccountAdminMixin, AccountAdmin
 from orchestra.forms.widgets import paddingCheckboxSelectMultiple
 
 from . import settings, actions
-from .filters import BillTypeListFilter, HasBillContactListFilter, TotalListFilter, PaymentStateListFilter
-from .models import Bill, Invoice, AmendmentInvoice, Fee, AmendmentFee, ProForma, BillLine, BillContact
+from .filters import (BillTypeListFilter, HasBillContactListFilter, TotalListFilter,
+    PaymentStateListFilter, AmendedListFilter)
+from .models import (Bill, Invoice, AmendmentInvoice, Fee, AmendmentFee, ProForma, BillLine,
+    BillContact)
 
 
 PAYMENT_STATE_COLORS = {
@@ -185,8 +187,12 @@ class BillAdmin(AccountAdminMixin, ExtendedModelAdmin):
         'number', 'type_link', 'account_link', 'created_on_display',
         'num_lines', 'display_total', 'display_payment_state', 'is_open', 'is_sent'
     )
-    list_filter = (BillTypeListFilter, 'is_open', 'is_sent', TotalListFilter, PaymentStateListFilter)
+    list_filter = (
+        BillTypeListFilter, 'is_open', 'is_sent', TotalListFilter, PaymentStateListFilter,
+        AmendedListFilter
+    )
     add_fields = ('account', 'type', 'amend_of', 'is_open', 'due_on', 'comments')
+    change_list_template = 'admin/bills/change_list.html'
     fieldsets = (
         (None, {
             'fields': ('number', 'type', 'amend_of_link', 'account_link', 'display_total',
@@ -243,9 +249,13 @@ class BillAdmin(AccountAdminMixin, ExtendedModelAdmin):
             url = reverse('admin:%s_%s_changelist' % (t_opts.app_label, t_opts.model_name))
             url += '?bill=%i' % bill.pk
         state = bill.get_payment_state_display().upper()
+        title = ''
+        if bill.closed_amends:
+            state += '*'
+            title = _("This bill has been amended, this value may not be valid.")
         color = PAYMENT_STATE_COLORS.get(bill.payment_state, 'grey')
-        return '<a href="{url}" style="color:{color}">{name}</a>'.format(
-            url=url, color=color, name=state)
+        return '<a href="{url}" style="color:{color}" title="{title}">{name}</a>'.format(
+            url=url, color=color, name=state, title=title)
     display_payment_state.allow_tags = True
     display_payment_state.short_description = _("Payment")
     
@@ -309,6 +319,7 @@ class BillAdmin(AccountAdminMixin, ExtendedModelAdmin):
                 (F('lines__subtotal') + Coalesce(F('lines__sublines__total'), 0)) * (1+F('lines__tax')/100)
             ),
         )
+        qs = qs.prefetch_related(Prefetch('amends', queryset=Bill.objects.filter(is_open=False), to_attr='closed_amends'))
         return qs
     
     def change_view(self, request, object_id, **kwargs):
diff --git a/orchestra/contrib/bills/filters.py b/orchestra/contrib/bills/filters.py
index 8df9ffee..dae95794 100644
--- a/orchestra/contrib/bills/filters.py
+++ b/orchestra/contrib/bills/filters.py
@@ -91,7 +91,6 @@ class PaymentStateListFilter(SimpleListFilter):
             ('PAID', _("Paid")),
             ('PENDING', _("Pending")),
             ('BAD_DEBT', _("Bad debt")),
-            ('AMENDED', _("Amended")),
         )
     
     def queryset(self, request, queryset):
@@ -128,7 +127,29 @@ class PaymentStateListFilter(SimpleListFilter):
                 Q(transactions__state=Transaction.REJECTED) |
                 Q(transactions__isnull=True)
             )
-        elif self.value() == 'AMENDED':
-            amendeds = queryset.filter(type__in=Bill.AMEND_MAP.values(), is_open=False)
-            amendeds_ids = amendeds.values_list('amend_of', flat=True)
-            return queryset.filter(id__in=amendeds)
+
+
+class AmendedListFilter(SimpleListFilter):
+    title = _("amended")
+    parameter_name = 'amended'
+    
+    def lookups(self, request, model_admin):
+        return (
+            ('1', _("Closed amends")),
+            ('-1', _("Open or closed amends")),
+            ('0', _("No closed amends")),
+            ('-0', _("No amends")),
+        )
+    
+    def queryset(self, request, queryset):
+        if self.value() is None:
+            return queryset
+        amended = queryset.filter(type__in=Bill.AMEND_MAP.values(), amend_of__isnull=False)
+        if not self.value().startswith('-'):
+            amended = amended.filter(is_open=False)
+        amended_ids = amended.distinct().values_list('amend_of_id', flat=True)
+        if self.value().endswith('1'):
+            return queryset.filter(id__in=amended_ids)
+        else:
+            return queryset.exclude(id__in=amended_ids)
+
diff --git a/orchestra/contrib/bills/models.py b/orchestra/contrib/bills/models.py
index d7d933ea..84166d81 100644
--- a/orchestra/contrib/bills/models.py
+++ b/orchestra/contrib/bills/models.py
@@ -140,8 +140,6 @@ class Bill(models.Model):
     def payment_state(self):
         if self.is_open or self.get_type() == self.PROFORMA:
             return self.OPEN
-        elif self.amends.filter(is_open=False).exists():
-            return self.AMENDED
         secured = 0
         pending = 0
         created = False
diff --git a/orchestra/contrib/bills/templates/admin/bills/change_list.html b/orchestra/contrib/bills/templates/admin/bills/change_list.html
new file mode 100644
index 00000000..da8cbc0e
--- /dev/null
+++ b/orchestra/contrib/bills/templates/admin/bills/change_list.html
@@ -0,0 +1,12 @@
+{% extends "admin/change_list.html" %}
+{% load i18n admin_urls %}
+
+
+{% block object-tools-items %}
+<li>
+  {% url 'admin:bills_bill_add' as add_url %}
+  <a href="{% add_preserved_filters add_url is_popup to_field %}" class="addlink">
+    {% trans "Add bill" %}
+  </a>
+</li>
+{% endblock %}
diff --git a/orchestra/contrib/lists/backends.py b/orchestra/contrib/lists/backends.py
index 758d70b3..5ee8f23d 100644
--- a/orchestra/contrib/lists/backends.py
+++ b/orchestra/contrib/lists/backends.py
@@ -19,19 +19,19 @@ class MailmanVirtualDomainBackend(ServiceController):
         ('LISTS_VIRTUAL_ALIAS_DOMAINS_PATH',)
     )
     
-    def is_local_domain(self, domain):
+    def is_hosted_domain(self, domain):
         """ whether or not domain MX points to this server """
         return domain.has_default_mx()
     
     def include_virtual_alias_domain(self, context):
         domain = context['address_domain']
-        if domain and self.is_local_domain(domain):
+        if domain and self.is_hosted_domain(domain):
             self.append(textwrap.dedent("""
                 # Add virtual domain %(address_domain)s
                 [[ $(grep '^\s*%(address_domain)s\s*$' %(virtual_alias_domains)s) ]] || {
                     echo '%(address_domain)s' >> %(virtual_alias_domains)s
                     UPDATED_VIRTUAL_ALIAS_DOMAINS=1
-                }""") % self.context
+                }""") % context
             )
     
     def is_last_domain(self, domain):
@@ -108,8 +108,9 @@ class MailmanBackend(MailmanVirtualDomainBackend):
             context['suffix'] = suffix
             # Because mailman doesn't properly handle lists aliases we need two virtual aliases
             aliases.append("%(address_name)s%(suffix)s@%(domain)s\t%(name)s%(suffix)s" % context)
-            # And another with the original list name; Mailman generates links with it
-            aliases.append("%(name)s%(suffix)s@%(domain)s\t%(name)s%(suffix)s" % context)
+            if context['address_name'] != context['name']:
+                # And another with the original list name; Mailman generates links with it
+                aliases.append("%(name)s%(suffix)s@%(domain)s\t%(name)s%(suffix)s" % context)
         return '\n'.join(aliases)
     
     def save(self, mail_list):
@@ -122,7 +123,10 @@ class MailmanBackend(MailmanVirtualDomainBackend):
             }""") % context)
         # Custom domain
         if mail_list.address:
-            context['aliases'] = self.get_virtual_aliases(context)
+            context.update({
+                'aliases': self.get_virtual_aliases(context),
+                'num_entries': 2 if context['address_name'] != context['name'] else 1,
+            })
             self.append(textwrap.dedent("""\
                 # Create list alias for custom domain
                 aliases='%(aliases)s'
@@ -130,7 +134,7 @@ class MailmanBackend(MailmanVirtualDomainBackend):
                     echo "${aliases}" >> %(virtual_alias)s
                     UPDATED_VIRTUAL_ALIAS=1
                 else
-                    if [[ ! $(grep '^\s*%(address_name)s@%(address_domain)s\s\s*%(name)s\s*$' %(virtual_alias)s) ]]; then
+                    if [[ $(grep -E '^\s*(%(address_name)s|%(name)s)@%(address_domain)s\s\s*%(name)s\s*$' %(virtual_alias)s|wc -l) -ne %(num_entries)s ]]; then
                         sed -i -e '/^.*\s%(name)s\(%(suffixes_regex)s\)\s*$/d' \\
                                -e 'N; /^\s*\\n\s*$/d; P; D' %(virtual_alias)s
                         echo "${aliases}" >> %(virtual_alias)s
diff --git a/orchestra/contrib/orchestration/__init__.py b/orchestra/contrib/orchestration/__init__.py
index 3e717bdd..76880092 100644
--- a/orchestra/contrib/orchestration/__init__.py
+++ b/orchestra/contrib/orchestration/__init__.py
@@ -22,7 +22,7 @@ class Operation():
     
     def __hash__(self):
         """ set() """
-        return hash(self.backend) + hash(self.instance) + hash(self.action)
+        return hash((self.backend, self.instance, self.action))
     
     def __eq__(self, operation):
         """ set() """
diff --git a/orchestra/contrib/payments/admin.py b/orchestra/contrib/payments/admin.py
index 8bff0a46..85edd775 100644
--- a/orchestra/contrib/payments/admin.py
+++ b/orchestra/contrib/payments/admin.py
@@ -109,9 +109,9 @@ class TransactionAdmin(SelectAccountAdminMixin, ExtendedModelAdmin):
         exclude = []
         if obj:
             if obj.state == Transaction.WAITTING_PROCESSING:
-                exclude = ['mark_as_executed', 'mark_as_secured', 'mark_as_rejected']
+                exclude = ['mark_as_executed', 'mark_as_secured']
             elif obj.state == Transaction.WAITTING_EXECUTION:
-                exclude = ['process_transactions', 'mark_as_secured', 'mark_as_rejected']
+                exclude = ['process_transactions', 'mark_as_secured']
             if obj.state == Transaction.EXECUTED:
                 exclude = ['process_transactions', 'mark_as_executed']
             elif obj.state in [Transaction.REJECTED, Transaction.SECURED]:
diff --git a/orchestra/contrib/webapps/settings.py b/orchestra/contrib/webapps/settings.py
index 8f2b5363..5c49b587 100644
--- a/orchestra/contrib/webapps/settings.py
+++ b/orchestra/contrib/webapps/settings.py
@@ -192,7 +192,6 @@ WEBAPPS_PHP_DISABLED_FUNCTIONS = Setting('WEBAPPS_PHP_DISABLED_FUNCTION', (
     'system',
     'proc_open',
     'popen',
-    'curl_exec',
     'curl_multi_exec',
     'show_source',
     'pcntl_exec',