Recent threads on front page not updating

[Dolby]

Some recent threads from certain forums aren't displayed on the front page including threads from this forum. I no longer use no-cache headers as to reduce the load on the server. This tells your browser that its ok to cache this page but I havent experienced a problem with it not updating the page on my roadrunner isp or my cingular 3G isp. What happens when you know the content is out of date and you do a CNTRL - F5 on your end to force a refresh?