--- a/lisp/vm/vm-vars.el	Mon Aug 13 09:38:27 2007 +0200
+++ b/lisp/vm/vm-vars.el	Mon Aug 13 09:39:39 2007 +0200
@@ -1636,32 +1636,22 @@
 it was invoked.  VM will not create, delete, or use any other windows,
 nor will it resize its own window.")
 
-(defvar vm-mutable-frames nil
+(defvar vm-mutable-frames t
   "*Non-nil value means VM is allowed to create and destroy frames
-to display and undisplay buffers.
+to display and undisplay buffers.  Whether VM actually does
+so depends on the value of the variables with names prefixed by
+`vm-frame-per-'.
 
 VM can create a frame to display a buffer, and delete frame to
 undisplay a buffer.  A nil value means VM should not create or
 delete frames.
 
-This variable is _not_ an analogue of vm-mutable-windows.  VM
-still might create frames if this variable is nil.  If you set
-the vm-frame-per-* variables VM will still create frames.  Using
-the vm-frame-per-* variables you have more control over when it
-happens.
-
-Users should consider setting vm-frame-per-folder and
-vm-frame-per-composition and/or using the -other-frame commands
-instead of setting this variable.  If vm-mutable-frames is set to t,
-then vm-mutable-windows should probably be set to nil so that you
-avoid splitting frames.
+This variable used to have a different meaning but it was changed
+to better reflect what users expected.  This variable is now a
+frame analogue of vm-mutable-windows.
 
 This variable does not apply to the VM commands whose
-names end in -other-frame, which always create a new frame.
-
-This variable has no meaning if you're not running Emacs native
-under X Windows or some other window system that allows multiple
-Emacs frames.")
+names end in -other-frame, which always create a new frame.")
 
 (defvar vm-raise-frame-at-startup t
   "*Specifies whether VM should raise its frame at startup.
@@ -1675,9 +1665,10 @@
 does not apply to the VM commands whose names end in
 -other-frame, which always create a new frame.
 
-This variable has no meaning if you're not running Emacs native
-under X Windows or some other window system that allows multiple
-Emacs frames.")
+This variable has no meaning if you're not running under an Emacs
+capable of displaying multiple real or virtual frames.  Note that
+Emacs supports multiple virtual frames on dumb terminals, and
+VM will use them.")
 
 (defvar vm-frame-per-summary nil
   "*Non-nil value causes VM to display the folder summary in its own frame.
@@ -1685,9 +1676,10 @@
 This variable does not apply to vm-summarize-other-frame, which
 always create a new frame.
 
-This variable has no meaning if you're not running Emacs native
-under X Windows or some other window system that allows multiple
-Emacs frames.")
+This variable has no meaning if you're not running under an Emacs
+capable of displaying multiple real or virtual frames.  Note that
+Emacs supports multiple virtual frames on dumb terminals, and
+VM will use them.")
 
 (defvar vm-frame-per-composition t
   "*Non-nil value causes the mail composition commands to open a new frame.
@@ -1695,9 +1687,10 @@
 does not apply to the VM commands whose names end in
 -other-frame, which always create a new frame.
 
-This variable has no meaning if you're not running Emacs native
-under X Windows or some other window system that allows multiple
-Emacs frames.")
+This variable has no meaning if you're not running under an Emacs
+capable of displaying multiple real or virtual frames.  Note that
+Emacs supports multiple virtual frames on dumb terminals, and
+VM will use them.")
 
 (defvar vm-frame-per-edit t
   "*Non-nil value causes vm-edit-message to open a new frame.
@@ -1705,9 +1698,19 @@
 variable does not apply to vm-edit-message-other-frame, which
 always create a new frame.
 
-This variable has no meaning if you're not running Emacs native
-under X Windows or some other window system that allows multiple
-Emacs frames.")
+This variable has no meaning if you're not running under an Emacs
+capable of displaying multiple real or virtual frames.  Note that
+Emacs support multiple virtual frames on dumb terminals, and
+VM will use them.")
+
+(defvar vm-frame-per-help nil
+  "*Non-nil value causes VM to open a new frame to display help buffers.
+Nil means the VM will use the current frame.
+
+This variable has no meaning if you're not running under an Emacs
+capable of displaying multiple real or virtual frames.  Note that
+Emacs supports multiple virtual frames on dumb terminals, and
+VM will use them.")
 
 (defvar vm-frame-per-completion t
   "*Non-nil value causes VM to open a new frame on mouse
@@ -1725,7 +1728,8 @@
 
 This variable has no meaning if you're not running Emacs native
 under X Windows or some other window system that allows multiple
-Emacs frames.")
+real Emacs frames.  Note that Emacs supports virtual frames under
+ttys but VM will not use these to display completion information.")
 
 (defvar vm-frame-parameter-alist nil
   "*Non-nil value is an alist of types and lists of frame parameters.
@@ -1754,10 +1758,7 @@
    (e.g. created by vm-summarize-other-frame)
 
 PARAMLIST is a list of pairs as described in the documentation for
-the function `make-frame'.
-
-This variable has no effect on frames created as a result of
-having vm-mutable-frames set to non-nil.")
+the function `make-frame'.")
 
 (defvar vm-search-other-frames t
   "*Non-nil means VM should search frames other than the selected frame
@@ -2346,7 +2347,8 @@
     (define-key map "t" 'vm-expose-hidden-headers)
     (define-key map " " 'vm-scroll-forward)
     (define-key map "b" 'vm-scroll-backward)
-    (define-key map "\C-?" 'vm-scroll-backward)
+    (define-key map "\177" 'vm-scroll-backward)
+    (define-key map 'backspace 'vm-scroll-backward)
     (define-key map "D" 'vm-decode-mime-message)
     (define-key map "d" 'vm-delete-message)
     (define-key map "\C-d" 'vm-delete-message-backward)