I'm trying to set up an RSS reader to monitor my forums here (so I can keep it up all the time while I work). 2 of my forums work just fine, but the other 2 (Sirmeili , my devleoper forum and MeiKu) don't have any items in the RSS feed. At least one of them has a post as recent as today.

Is there any information on how back the RSS Feed goes to check for updates? Is there a setting I'm missing?