emacs -Q --debug-init -l ".../path/to/hexrgb.el" -l ".../path/to/oneonone.el" -f "1on1-emacs" See attached files hexrgb.el and oneonone.el, and screenshot. This is a regression wrt a build of 2008-07-26, where there was no such problem. In GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600) of 2008-08-01 on LENNART-69DE564 Windowing system distributor `Microsoft Corp.', version 5.1.2600 configured using `configure --with-gcc (3.4) --no-opt --cflags -Ic:/g/include -fno-crossjumping' 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: ENU value of $XMODIFIERS: nil locale-coding-system: cp1252 default-enable-multibyte-characters: t