bug#12088: 24.1.50; Display messed up on OS X

[Eric Hanchrow]

This happens in a very recent trunk build (commit
c486bb94c9055c4781de1b91b75c830bf70263cc
Author: Eli Zaretskii <eliz@gnu.org>
Date:   Sun Jul 29 21:33:47 2012 +0300

    Remove obsolete comment in mule-cmds.el.
), as well as the 24.1 version at emacsforosx.com

Visit a buffer with some text (this very bug report works fine).  Use
M-0 to put a non-blank line at the top of the window.  Now evaluate

(progn (set-frame-font "Monaco-20") (recenter-top-bottom 0))

Note that the line that was originally at the top of the screen is no
longer visible.

Now do M-- C-l.  I see a copy of the menu bar in the middle of the
window, in addition to the menu bar that is correctly at the top of
the window.


If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/Users/erichanchrow/local/src/emacs/nextstep/Emacs.app/Contents/Resources/etc/DEBUG.


In GNU Emacs 24.1.50.1 (x86_64-apple-darwin12.0.0, NS apple-appkit-1187.00)
 of 2012-07-29 on Eric-Hanchrows-MacBook-Air.local
Windowing system distributor `Apple', version 10.3.1187
Configured using:
 `configure '--with-ns' 'CFLAGS=-O2 -arch x86_64'
 'LDFLAGS=-L/opt/local/lib' 'CPPFLAGS=-I/opt/local/include''

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-x r e p o r t - e m <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils time-date tooltip ediff-hook vc-hooks
lisp-float-type mwheel ns-win tool-bar dnd fontset image regexp-opt
fringe tabulated-list newcomment lisp-mode register page menu-bar
rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax
facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak
czech european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer loaddefs button faces
cus-face files text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget hashtable-print-readable backquote
make-network-process dbusbind ns multi-tty emacs)