Index: app/controllers/issues_controller.rb
===================================================================
--- app/controllers/issues_controller.rb	(revision 1227)
+++ app/controllers/issues_controller.rb	(working copy)
@@ -206,9 +206,9 @@
     if request.post?
       status = params[:status_id].blank? ? nil : IssueStatus.find_by_id(params[:status_id])
       priority = params[:priority_id].blank? ? nil : Enumeration.find_by_id(params[:priority_id])
-      assigned_to = params[:assigned_to_id].blank? ? nil : User.find_by_id(params[:assigned_to_id])
+      assigned_to = (params[:assigned_to_id].blank? || params[:assigned_to_id] == 'none') ? nil : User.find_by_id(params[:assigned_to_id])
       category = params[:category_id].blank? ? nil : @project.issue_categories.find_by_id(params[:category_id])
-      fixed_version = params[:fixed_version_id].blank? ? nil : @project.versions.find_by_id(params[:fixed_version_id])
+      fixed_version = (params[:fixed_version_id].blank? || params[:fixed_version_id] == 'none') ? nil : @project.versions.find_by_id(params[:fixed_version_id])
       
       unsaved_issue_ids = []      
       @issues.each do |issue|
@@ -216,7 +216,7 @@
         issue.priority = priority if priority
         issue.assigned_to = assigned_to if assigned_to || params[:assigned_to_id] == 'none'
         issue.category = category if category
-        issue.fixed_version = fixed_version if fixed_version
+        issue.fixed_version = fixed_version if fixed_version || params[:fixed_version_id] == 'none'
         issue.start_date = params[:start_date] unless params[:start_date].blank?
         issue.due_date = params[:due_date] unless params[:due_date].blank?
         issue.done_ratio = params[:done_ratio] unless params[:done_ratio].blank?
Index: app/views/issues/bulk_edit.rhtml
===================================================================
--- app/views/issues/bulk_edit.rhtml	(revision 1227)
+++ app/views/issues/bulk_edit.rhtml	(working copy)
@@ -23,7 +23,9 @@
                                  content_tag('option', l(:label_nobody), :value => 'none') +
                                  options_from_collection_for_select(@project.assignable_users, :id, :name)) %></label>
 <label><%= l(:field_fixed_version) %>: 
-<%= select_tag('fixed_version_id', "<option value=\"\">#{l(:label_no_change_option)}</option>" + options_from_collection_for_select(@project.versions, :id, :name)) %></label>
+<%= select_tag('fixed_version_id', content_tag('option', l(:label_no_change_option), :value => '') +
+                                   content_tag('option', l(:label_none), :value => 'none') +
+                                   options_from_collection_for_select(@project.versions, :id, :name)) %></label>
 </p>
 
 <p>