Help me out here: is XFree86 4.4 not DFSG-compatible because they added an advertising clause to their license?
Update: Debian will not ship anything with the 1.1 license, full stop. [link] SuSE won't ship XFree86 4.4.0 under its current license as well. [link] We [Redhat] currently have no plans to ship XFree86 4.4.0 in the future. [link]