Make sure that changing tags (i.e. toggle star) touches the taggable (todo) to invalidate cache. Make sure _context is cached different for _context of active todos and _context of tagged todos and _context in tickler

app/models/tagging.rb

@@ -6,7 +6,7 @@ class Tagging < ActiveRecord::Base
   attr_accessible :taggable_id, :tag
  
   belongs_to :tag
-  belongs_to :taggable, :polymorphic => true
+  belongs_to :taggable, :polymorphic => true, :touch => true
   
   after_destroy :after_destroy
   
@@ -16,4 +16,5 @@ class Tagging < ActiveRecord::Base
   def after_destroy
     tag.destroy if tag and tag.taggings.count == 0
   end
+  
 end

app/views/contexts/_context.html.erb

@@ -1,6 +1,6 @@
 <%
 @not_done = @not_done_todos.select {|t| t.context_id == context.id }
-cache context do
+cache [context, @source_view] do
 %>
   <div id="c<%= context.id %>" class="container context" style="display:<%= (collapsible && @not_done.empty?) ? "none" : "block" %>">
     <h2>

lib/is_taggable.rb

@@ -64,7 +64,7 @@ module IsTaggable
       # Removes tags from <tt>self</tt>. Accepts a string of tagnames, an array of tagnames, or an array of Tags.
       def _remove_tags outgoing
         outgoing = tag_cast_to_string(outgoing)
-        tags.delete(*(tags.select{|tag| outgoing.include? tag.name}))
+        tags.destroy(*(tags.select{|tag| outgoing.include? tag.name}))
       end
       
       def get_tag_name_from_item(item)