Has there been thought or movement towards moving the configuration values into the database? It seems like having them reside in text files, and having to edit 1-3 files to do anything, is more difficult than it has to be.
One of these days, I'll stop complaining and just learn PHP and get this done.
I would suggest you download Mantis 1.1.0a1, try it out and give your feedback. I've implemented a web page that allows editing the configuration in the database. You can also have configuration options that are for all projects / all users, all users/single project, single user/all projects, single user/single project.