A number of packages install in /usr/X11R6/bin, rather than /usr/pkg/bin.
This is a nuisance, since it makes it harder to delete all packages 
(something I've occasionally been tempted to do, when the package 
dependency structure gets snafu'd) or when I want to upgrade X.

		--Steve Bellovin, http://www.research.att.com/~smb
				  http://www.wilyhacker.com