fixes #929. Manually applied revision:37a45313a0c0876272a871093e112c159c34b547 because it did not cleanly apply with cherry-pick

app/controllers/todos_controller.rb

@@ -47,6 +47,7 @@ class TodosController < ApplicationController
   
   def create
     @source_view = params['_source_view'] || 'todo'
+    @tag_name = params['_tag_name'] 
     p = TodoCreateParamsHelper.new(params, prefs)        
     p.parse_dates() unless mobile?
     
@@ -702,10 +703,15 @@ class TodosController < ApplicationController
   end
 
   def determine_deferred_tag_count(tag)
-    tag_collection = Tag.find_by_name(tag).todos
-    @deferred_tag_count = tag_collection.count(:all,
-      :conditions => ['todos.user_id = ? and state = ?', current_user.id, 'deferred'],
-      :order => 'show_from ASC, todos.created_at DESC')
+    tags = Tag.find_by_name(tag)
+    if tags.nil?
+      # should normally not happen, but is a workaround for #929
+      @deferred_tag_count = 0
+    else
+      @deferred_tag_count = tags.todos.count(:all,
+        :conditions => ['todos.user_id = ? and state = ?', current_user.id, 'deferred'],
+        :order => 'show_from ASC, todos.created_at DESC')
+    end
   end
 
   def render_todos_html

app/views/shared/_add_new_item_form.rhtml

@@ -110,7 +110,8 @@ $('todo_context_name').projectDefaultContextsMap = eval('(' + <%= @default_proje
   <%= text_field("todo", "show_from", "size" => 12, "class" => "Date", "onfocus" => "Calendar.setup", "tabindex" => 7, "autocomplete" => "off") %>
 </div>
 
-<%= source_view_tag( @source_view ) %> 
+<%= source_view_tag( @source_view ) %>
+<%= hidden_field_tag :_tag_name, @tag_name.underscore.gsub(/\s+/,'_') if source_view_is :tag %>
 
 <div class="submit_box">
   <div class="widgets">