Users disappear

Topics: Controls
Sep 14, 2008 at 5:40 AM
We're using version 1.4.5, and we can't add any more than 25 permanent users to the blog.  When we add user #26, he remains in there for about one day, then disappears from the list of users under settings, although he remains in the users.xml file.  We're using the standard XmlMembershipProvider. 

I'd be grateful for any ideas.