Actually Mateo, the Active threads one is much more than just junk. When you bring up a forum that has several thousand threads in it the script has to count all of the threads to do the proper paging, and even though it uses a limit and with proper indexing it still does a full table read. By throwing in a date into that query it only grabs entries from the database that are newer than the specified date. This has the benefit of being a very large improvement for large forums. Several seconds can be taken of a query on even moderate sized forums.
The search forum one helps balance out that area as well[]/w3timages/icons/wink.gif[/].
