fix for no tags

app/controllers/announcement_feeds_controller.rb

@@ -50,6 +50,8 @@ class AnnouncementFeedsController < ApplicationController
 			tags = bf.tag_ids
 			if !tags.empty?
 				announcements = Bulletin.can_display.is_approved.filter_by_tags(tags)
+			else
+				announcements = []
 			end
 		end
 		all_anns = []