We are using confluence at work as our wiki engine, which is a great step forward for us as an organisation. One thing with the software, that is constantly driving me crazy, is that the search page expires when you try to go back. I am assuming this is because they are are doing a post.
Search is good but you don’t always find the page you are looking for at the top of the list. When you are clicking few search results and constantly getting the Expired Page then needing to do a refresh it is definitely not a good user experience.