I also have run into a few errors that seem like bugs.
Submitting user pic: I choose the file but the submit fails. The server.log says it is because of an ns_ora call. DOH!
User login: If I turn on the intranet module, then users can not login. They get the password page, but it chokes on the pvt/home.tcl page. With the intranet module off, it works fine.
