I'm sponsoring a fix for Shawn Walker. (see http://www.opensolaris.org/jive/thread.jspa?messageID=153406)
The terse bug description is at: http://bugs.opensolaris.org/view_bug.do?bug_id=6397024 And the webrev is at: http://cr.opensolaris.org/~tdh/6397024/ The basic issue is that the help output from a nfs umount is wrong: # /usr/lib/fs/nfs/umount Usage: nfs umount [-o opts] {server:path | dir} The only flag allowed is -f, so this is the desired output: # /usr/lib/fs/nfs/umount Usage: nfs umount [-f] {server:path | dir}