As of March 10, 2007, the Vex Bugzilla has been decommissioned because I have moved servers and the current lack of activity around Vex does not justify me setting up a new Bugzilla.
If you need help with Vex, please post your question to one of the mailing lists:
I have exported the full list of bugs to a static HTML file. If you are interested in hosting the Vex bugzilla, or perhaps migrating it to a JIRA instance, I have created a MySQL dump of the Bugzilla database as of March 10, 2007.