The site was temporarily taken down by our host for using too many resources. Currently some of the forum pages are being cached by your browser, and might not refresh automatically until the cached versions are 5 minutes old (although for a brief period of time after the site just came back up, this was set to 2 days). I'll be lowing the value below 5 minutes in a day or two.
If you really must refresh a page more often than 5 minutes, then you can to click the refresh button on your browser while holding the control key.