diff --git a/etc/noosfero/varnish-noosfero.vcl b/etc/noosfero/varnish-noosfero.vcl
index 04d6bc3..272bd91 100644
--- a/etc/noosfero/varnish-noosfero.vcl
+++ b/etc/noosfero/varnish-noosfero.vcl
@@ -1,9 +1,8 @@
 sub vcl_recv {
   if (req.request == "GET" || req.request == "HEAD") {
     if (req.http.Cookie) {
-      # We only care about the "_noosfero_session.*" cookie, used for
-      # authentication.
-      if (req.http.Cookie !~ "_noosfero_session.*" ) {
+      # We only care about the "_noosfero_.*" cookies, used by Noosfero
+      if (req.http.Cookie !~ "_noosfero_.*" ) {
         # strip all cookies
         unset req.http.Cookie;
       }
diff --git a/plugins/shopping_cart/controllers/shopping_cart_plugin_controller.rb b/plugins/shopping_cart/controllers/shopping_cart_plugin_controller.rb
index 6941d35..74374cf 100644
--- a/plugins/shopping_cart/controllers/shopping_cart_plugin_controller.rb
+++ b/plugins/shopping_cart/controllers/shopping_cart_plugin_controller.rb
@@ -290,7 +290,7 @@ class ShoppingCartPluginController < PublicController
   end
 
   def cookie_key
-    :_noosfero_session_shopping_cart
+    :_noosfero_plugin_shopping_cart
   end
 
 end
diff --git a/vendor/plugins/noosfero_caching/init.rb b/vendor/plugins/noosfero_caching/init.rb
index 1033838..48c14e1 100644
--- a/vendor/plugins/noosfero_caching/init.rb
+++ b/vendor/plugins/noosfero_caching/init.rb
@@ -38,13 +38,23 @@ module NoosferoHttpCaching
     def call(env)
       status, headers, body = @app.call(env)
       if headers['X-Noosfero-Auth'] == 'false'
-        # FIXME do not do this if there is any plugin cookie set (e.g.
-        # _noosfero_session_shopping_cart)
-        headers.delete('Set-Cookie')
+        headers['Set-Cookie'] = remove_unwanted_cookies(headers['Set-Cookie'])
       end
       headers.delete('X-Noosfero-Auth')
       [status, headers, body]
     end
+
+    protected
+
+    # filter off all cookies except for plugin-provided ones that are
+    # path-specific (i.e path != "/").
+    def remove_unwanted_cookies(cookie_list)
+      return nil if cookie_list.nil?
+      cookie_list.select do |c|
+        c =~ /^_noosfero_plugin_\w+=/ && c =~ /path=\/\w+/
+      end
+    end
+
   end
 
 end
--
libgit2 0.21.2