threads are only visible on the forum for the default, i beleive it's one day. If you click "for sale" and then go to the bottom, you have the option to view them from .. however long you want. They are still there and you can still post in them, you just have to go back further than the default to see it if nobody has posted in it. Alternatively, you can check your own profile and view your posts there, if you are having trouble digging for it. http://mnsubaru.com/forums/showthread.php/38317-STi-cat-back-exhaust?p=709949
oh the drop down box "show threads from the..." ok thanks does every forum have that or just the for sale one?
Every forum has it, like OT is one day default too I believe. I think some of them have a longer default time, but those forums don't move fast.
Or fix it for all forums: Settings (top right) -> General Settings -> Default Thread Age Cut Off: Show All Threads (pulldown)