Unstable, in the context of Debian, isn't being used to imply that a package is unreliable or something, it means the repositories themselves are unstable, ie. packages are updated often. Of course, it follows from this that the unstable repos will have more bugs than the more stable repositories, cause unstable is the first line of QA for new packages. Apologies if this isn't the source of your confusion, I'm just trying to help.
-- Backport MediaWiki https://launchpad.net/bugs/49056 -- ubuntu-backports mailing list ubuntu-backports@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-backports
