Debugger entered--Lisp error: (wrong-type-argument symbolp (get backend (quote vc-functions)))
  vc-call-backend(RCS registered "/home/steve/cvsroot/emacs/configure")
  #[(b) "\302\303	#\205\304	\305#\205\306\307\310\"\207" [b file vc-call-backend registered vc-file-setprop vc-backend throw found t] 4](RCS)
  mapc(#[(b) "\302\303	#\205\304	\305#\205\306\307\310\"\207" [b file vc-call-backend registered vc-file-setprop vc-backend throw found t] 4] (RCS CVS SVN SCCS Bzr Git Hg Mtn Arch))
  byte-code("\303\304\"\305\306	\203	\307=\203\n\202	\nB\"\210)\310\304\307#\210\311\207" [file backend vc-handled-backends vc-file-getprop vc-backend mapc #[(b) "\302\303	#\205\304	\305#\205\306\307\310\"\207" [b file vc-call-backend registered vc-file-setprop vc-backend throw found t] 4] none vc-file-setprop nil] 4)
  vc-registered("/home/steve/cvsroot/emacs/configure")
  vc-backend("/home/steve/cvsroot/emacs/configure")
  #[nil "\301!\207" [buffer-file-name vc-backend] 2]()
  vc-find-file-hook()
  run-hooks(find-file-hook)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer configure> "~/cvsroot/emacs/configure" nil nil "/Users/steve/cvsroot/emacs/configure" (132524 2056))
  find-file-noselect("/home/steve/cvsroot/emacs/configure" nil nil nil)
  find-file("/home/steve/cvsroot/emacs/configure")
  dired-find-file()
  call-interactively(dired-find-file nil nil)