Disclaimer: I heard this on WebmasterRadio.FM's StrikePoint show, where Mikkel and DaveN go at it on the air. I do not know both sides of the story.
I have heard that Jenstar, of JenSense.com, has stepped down from moderating at WebmasterWorld. Jenstar is known as the contextual ad queen, speaking at both Search Engine Strategies and Webmasterworld Pub conferences. She also blogs and moderates at Search Engine Watch on contextual ad topics. Jenstar was the moderator at WebmasterWorld for the Google AdSense Forum.
I found a thread where the JenSense domain name has been blocked out by the WebmasterWorld blacklist. The blacklist is a list of domains that are not allowed to be posted. Maybe this has to do with Jennifer leaving? I can not say.
IMO, this is a big loss for WebmasterWorld.