emacs -Q; open a new frame using "C-x 5 2" and switch to that frame.
Then switch from *scratch* to *Messages* in the first frame.  Enable
ido-mode using "M-x ido-mode".  Switch to the second frame and try
switching to *Messages*.  The point (and focus) move to the other
window.

Setting the ido-mode variables `ido-default-file-method' and
`ido-default-buffer-method' to 'selected-window does not change this
behavior.

This is infuriating!  I should be able to switch to whatever buffer I
want with multiple frames and not have the focus change.  Let me give
you an example: I have a gdb session running, so I have several frames,
one for output, one for backtrace and one for the gdb controller.  For
some reason the gdb frame was split into two windows and I accidentally
deleted the wrong one and now the Separate IO is going into the gdb
buffer.  However, when I try to to switch back to the *gud* buffer, it
puts the point in a completely different window.  I don't want *gud* in
that frame, I want it in the one I'm trying to put it in!  NOTE: THIS
BEHAVIOR PERSISTS EVEN AFTER SWITCHING OUT OF IDO-SWITCH-BUFFER BY
PRESSING "C-b".  


In GNU Emacs 23.2.1 (x86_64-redhat-linux-gnu, GTK+ Version 2.20.1)
 of 2010-05-13 on x86-07.phx2.fedoraproject.org
Windowing system distributor `Fedora Project', version 11.0.10802000
configured using `configure  '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--program-prefix=' '--disable-dependency-tracking' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--with-dbus' '--with-gif' '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff' '--with-xft' '--with-xpm' '--with-x-toolkit=gtk' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic''

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: en_US.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Debugger

Minor modes in effect:
  shell-dirtrack-mode: t
  auto-insert-mode: t
  global-auto-complete-mode: t
  diff-auto-refine-mode: t
  which-function-mode: t
  show-paren-mode: t
  savehist-mode: t
  epa-global-mail-mode: t
  display-time-mode: t
  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-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<triple-mouse-4> <triple-down-mouse-4> <triple-mouse-4> 
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4> 
<triple-mouse-4> C-s w i n d o w <return> M-: i d o 
- d e f a u l t - f i l e - m e t h o d <return> M-: 
M-p M-f M-f M-f M-D b u f f e r <return> <f1> i d m 
i d <tab> <tab> <backspace> <backspace> e m a c s <return> 
i i d o <return> <switch-frame> <switch-frame> <switch-frame> 
C-x b C-b <return> M-x c u s t o m i z e C-g <f1> v 
s w i t c h <tab> <tab> M-D s w i t c h <tab> <tab> 
<tab> C-g <f1> f s w i t c h SPC SPC SPC C-g M-x c 
u s t o m i z e SPC g r SPC <return> w i n d o w s 
<return> <help-echo> <down-mouse-5> <mouse-5> <double-down-mouse-5> 
<double-mouse-5> <triple-down-mouse-5> <triple-mouse-5> 
<down-mouse-5> <mouse-5> <double-down-mouse-5> <double-mouse-5> 
<down-mouse-5> <mouse-5> <down-mouse-5> <mouse-5> <double-down-mouse-5> 
<double-mouse-5> <down-mouse-5> <mouse-5> <double-down-mouse-5> 
<double-mouse-5> <down-mouse-5> <mouse-5> <down-mouse-5> 
<mouse-5> <down-mouse-4> <mouse-4> <double-down-mouse-4> 
<double-mouse-4> <triple-down-mouse-4> <triple-mouse-4> 
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4> 
<triple-mouse-4> <triple-down-mouse-4> <triple-mouse-4> 
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4> 
<triple-mouse-4> <help-echo> <switch-frame> <switch-frame> 
<help-echo> <help-echo> <down-mouse-1> <mouse-movement> 
<mouse-1> <help-echo> <menu-bar> <buffer> C-b <help-echo> 
<down-mouse-3> <mouse-3> <down-mouse-1> <mouse-movement> 
<mouse-1> <double-down-mouse-1> <double-mouse-1> <help-echo> 
<down-mouse-1> <mouse-movement> <mouse-movement> <drag-mouse-1> 
<switch-frame> <switch-frame> <help-echo> <switch-frame> 
<down-mouse-1> <mouse-movement> <mouse-1> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<menu-bar> <buffer> <next-buffer> <switch-frame> <switch-frame> 
<switch-frame> <switch-frame> <switch-frame> <switch-frame> 
<down-mouse-1> <mouse-movement> <mouse-1> C-x C-b <switch-frame> 
<switch-frame> <switch-frame> <switch-frame> C-x b 
<return> <help-echo> <help-echo> <switch-frame> <switch-frame> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <down-mouse-1> <mouse-movement> <mouse-1> 
<help-echo> C-p C-p C-n C-j C-l C-j C-l C-k C-j C-; 
C-l C-k C-j C-; C-l C-k C-j <menu-bar> <buffer> C-a 
<help-echo> <switch-frame> <switch-frame> <switch-frame> 
M-x r e p o r t SPC e m a SPC SPC <return>

Recent messages:
Creating group state...
Creating group... done
Creating customization items ...done
Resetting customization items...done
Creating customization setup...done
byte-code: Beginning of buffer [2 times]
Updating buffer list...
Formats have changed, recompiling...done
Updating buffer list...done
Commands: m, u, t, RET, g, k, S, D, Q; q to quit; h for help

Load-path shadows:
/usr/share/emacs/site-lisp/flim/hex-util hides /usr/share/emacs/23.2/lisp/hex-util
/usr/share/emacs/site-lisp/flim/md4 hides /usr/share/emacs/23.2/lisp/md4
/usr/share/emacs/site-lisp/flim/sha1 hides /usr/share/emacs/23.2/lisp/sha1
/usr/share/emacs/site-lisp/ruby-mode/ruby-mode hides /usr/share/emacs/23.2/lisp/progmodes/ruby-mode
/usr/share/emacs/site-lisp/flim/sasl hides /usr/share/emacs/23.2/lisp/net/sasl
/usr/share/emacs/site-lisp/flim/hmac-def hides /usr/share/emacs/23.2/lisp/net/hmac-def
/usr/share/emacs/site-lisp/flim/hmac-md5 hides /usr/share/emacs/23.2/lisp/net/hmac-md5
/usr/share/emacs/site-lisp/flim/sasl-digest hides /usr/share/emacs/23.2/lisp/net/sasl-digest
/usr/share/emacs/site-lisp/flim/sasl-ntlm hides /usr/share/emacs/23.2/lisp/net/sasl-ntlm
/usr/share/emacs/site-lisp/flim/sasl-cram hides /usr/share/emacs/23.2/lisp/net/sasl-cram
/usr/share/emacs/site-lisp/flim/ntlm hides /usr/share/emacs/23.2/lisp/net/ntlm

Features:
(shadow emacsbug winner windmove follow warnings doc-view ps-mode crm
cus-edit gnus-cite smiley mail-extr gnus-bcklg gnus-async gnus-dup
gnus-uu yenc sort gnus-ml utf-7 utf7 disp-table woman man asm-mode
thingatpt conf-mode newcomment dabbrev cmuscheme scheme sh-script
executable gdb-ui bindat json gud image-mode image-file image-dired
locate gnuplot-gui gnuplot info-look help-mode view info timezone
nnfolder nnagent nnml nnimap imap nndraft nnmh gnus-agent gnus-srvr
gnus-score score-mode nnvirtual gnus-msg gnus-art mm-uu mml2015 mm-view
smime dig nntp gnus-cache gnus-sum nnoo gnus-group gnus-undo nnmail
mail-source gnus-start gnus-spec gnus-int gnus-range message idna
ecomplete rfc822 mml mml-sec mm-decode mm-bodies mm-encode mailcap
mail-parse rfc2231 rfc2047 rfc2045 qp ietf-drums mailabbrev gmm-utils
mailheader canlock sha1 sha1-el hex-util hashcash gnus-win gnus gnus-ems
nnheader mule-util cal-move parse-time jka-compr cal-iso compile
make-mode multi-isearch vc-dispatcher vc-svn cc-mode cc-fonts cc-menus
cc-cmds cc-styles cc-align cc-engine cc-vars vc-hg footnote flyspell
ispell org-wl org-w3m org-vm org-rmail org-mhe org-mew org-irc
org-jsinfo org-infojs org-html org-exp org-exp-blocks org-agenda
org-info org-gnus org-bibtex org-bbdb tramp-imap tramp-gw tramp-gvfs
zeroconf url-parse url-vars mm-util mail-prsvr dbus xml tramp-fish
tramp-smb tramp-cache tramp-ftp tramp-cmds tramp auth-source gnus-util
netrc password-cache format-spec tramp-compat trampver shell comint
autoinsert org-clock org org-footnote org-src org-list org-faces
org-compat org-macs time-date noutline outline speedbar sb-image ezimage
dframe assoc server appt diary-lib diary-loaddefs cal-menu calendar
cal-loaddefs ansi-color xcscope idomenu ido c-eldoc cc-defs eldoc
auto-complete-config auto-complete popup ibuf-ext ibuffer preview
prv-emacs latex tex-style tex-buf tex reftex reftex-vars uniquify
dired-x dired-aux supercite sendmail regi psvn byte-opt bytecomp
byte-compile advice help-fns advice-preload edmacro kmacro log-edit ring
pcvs-util add-log diff-mode easy-mmode pp elp ediff-merg ediff-diff
ediff-wind ediff-mult ediff-help ediff-init ediff-util dired regexp-opt
midnight which-func imenu paren savehist avoid epa-mail mail-utils epa
derived epg epg-config time cus-start cus-load preview-latex color-theme
easymenu wid-edit cl cl-19 bbdb-autoloads tex-site auto-loads tooltip
ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd font-setting
tool-bar dnd fontset image fringe lisp-mode register page menu-bar
rfn-eshadow timer select scroll-bar mldrag 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 loaddefs button
minibuffer faces cus-face files text-properties overlay md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind system-font-setting
font-render-setting gtk x-toolkit x multi-tty emacs)

-- 
Joel J. Adamson
Servedio Lab
University of North Carolina at Chapel Hill

FSF Member #8164
http://www.unc.edu/~adamsonj