It is much better to use rails helpers to create forms.

page_group_permissions/app/views/admin/group/edit.html.erb

@@ -4,7 +4,7 @@
 <h1 id="edit_page">Edit Group</h1>
 <% end -%>
 
-<% form_for :group do |f| %>
+<% form_for :group, :method => 'post' do |f| %>
 <table class="fieldset" cellpadding="0" cellspacing="0" border="0">
     <tr>
         <td class="label"><label for="group_name">Name</label></td>

page_group_permissions/app/views/admin/group/index.html.erb

@@ -67,12 +67,12 @@
             <small class="note"><%=h group.notes %></small>
         </td>
         <td class="add-child">
-            <form method="post" action="<%= group_add_member_url :id => group %>">
+            <% form_tag group_add_member_url(:id => group) do %>
                 <select name="user_id", id="user_id">
                     <%= options_for_select User.find(:all, :order => 'name ASC').map{|u| [u.name, u.id]}.unshift(['—', '']) %>
                 </select>
                 <%= image_submit_tag('page_group_permissions/add-member.png', :alt => 'Add Group Member') %>
-            </form>
+            <% end %>
         </td>
         <td class="remove">
             <%= link_to image('remove', :alt => 'Remove Group'), group_remove_url(:id => group) %>

page_group_permissions/app/views/admin/group/remove.html.erb

@@ -18,6 +18,6 @@
   </tbody>
 </table>
 
-<form method="post" action="">
+<% form_tag "", :method => 'post' do %>
   <p class="buttons"><%= submit_tag "Delete Group", :class => 'button' %> or <%= link_to 'Cancel', group_index_url %></p>
-</form>
+<% end %>

page_group_permissions/app/views/admin/group/remove_member.html.erb

@@ -1,6 +1,6 @@
 <h1>Remove Member</h1>
 <p>Are you sure you want to remove <strong><%=h @user.name %></strong> from the group <strong><%= @group.name %></strong>?</p>
 
-<form method="post" action="">
+<% form_tag "", :method => 'post' do %>
   <p class="buttons"><%= submit_tag "Remove Member", :class => 'button' %> or <%= link_to 'Cancel', group_index_url %></p>
-</form>
+<% end %>