Package: Emacs Version: 24.0.94 Extract the test.cpio and cpio-mode.el files attached, and then try: src/emacs -Q -l .../cpio-mode.el .../test.cpio First, you'll note that the cursor is displayed at end-of-line (whereas in reality point as it BOB), then move forward with C-f and you'll see the cursor jumping in odd ways (often being pushed to end-of-line even when we're still in the middle of the line). In Emacs-23, the cursor jumps correctly over the various display and invisible fields, so this is a regression. Stefan In GNU Emacs 24.0.94.1 (i386-unknown-linux-gnu, GTK+ Version 2.24.10) of 2012-03-21 on pastel Windowing system distributor `The X.Org Foundation', version 11.0.11104000 Configured using: `configure 'CFLAGS=-Wall -Wno-pointer-sign -DUSE_LISP_UNION_TYPE -DSYNC_INPUT -DENABLE_CHECKING -DXASSERTS -DFONTSET_DEBUG -g -O0' '--with-tiff=no'' Important settings: value of $LC_ALL: nil value of $LC_COLLATE: nil value of $LC_CTYPE: nil value of $LC_MESSAGES: nil value of $LC_MONETARY: nil value of $LC_NUMERIC: nil value of $LC_TIME: nil value of $LANG: fr_CH.UTF-8 value of $XMODIFIERS: nil locale-coding-system: utf-8-unix default enable-multibyte-characters: t