I have not tried using ZDiscussion with a virtual host Apache proxy. If I get the time I will try it. You can take a look at the environment passed to your objects by the dtml-var REQUEST trick; it may be that ZDiscussion is using some other method of finding its base URL. (I actually sent a patch to Evan for SiteAccess because he does not set SERVER_URL, which a few products may use.) -----Original Message----- Have you attempted to use ZDiscussion or other ZCatalog Aware ZClasses on your site. I ask because we have attempted to use SiteAccess and have found that entries in a Catalog entered via a VirtualHost appear to store their reference incorrectly somehow, and when a search is done for what the objects are via the children() or posts() methods we get erroneous references. Have you seen any such problems.