This update contains a big new feature - the ability to add a "public" face to your bug tracker. By simply adding a viewable=1 property to the ini file for your project, the general public can browse (along w/ filter, search) your bug database. They will not be able to add, edit, or delete, but they can view any bug.
You can download Lighthouse here.
P.S. A bug with sorting on Owner was fixed as well.