Greg, it's still there -
http://www.xoutpost.com/showthread.php?t=107
What you are likely experiencing is your preferences are limiting how far back in time you can view posts. Go to the "User CP" (control panel) and click on "Edit Options". Scan down in the "Thread Display Options" and you will see a field called "Default Thread Age Cut Off". You likely have it set to something other than "Show all threads".
Let me know if that doesn't care for it.
Jeff