Hello Jeremy! Some first impressions from XQuartz 2.7.0 (xorg-server 1.10.99.901) on Snow Leopard. When I have one GNU Emacs window partially hiding another GNU Emacs window and I want to pick the top-most one with the mouse at the title bar, than this event is sent to the X client below, for example selecting there a line of text. The picking succeeds when I pick that part of the title bar which is outside of the buried X client. These malfunctions are quite often. The GNU Emacsen I use are of version 24.0.50 and compiled as a first try: In GNU Emacs 24.0.50.1 (x86_64-apple-darwin10.8.0, X toolkit, Xaw3d scroll bars) of 2011-07-14 on peter-dyballas-macbook-pro.fritz.box Windowing system distributor `The X.Org Foundation', version 11.0.11099901 configured using `configure '--without-sound' '--without-dbus' '--without-pop' '--without-gconf' '--without-gsettings' '--without-gpm' '--without-xpm' '--without-jpeg' '--without-tiff' '--without-gif' '--without-png' '--without-rsvg' '--with-x-toolkit=athena' '--enable-locallisppath=/Library/Application Support/Emacs/calendar24:/Library/Application Support/Emacs' 'CFLAGS=-g -H -pipe -fPIC -fno-common -Os' 'LDFLAGS=-Wl,-dead_strip_dylibs -Wl,-bind_at_load -Wl,-t' 'PKG_CONFIG_PATH=/opt/local/lib/pkgconfig:/opt/local/share/pkgconfig:/usr/lib/pkgconfig'' I also have GNU Emacs 23.3 as installed with MacPorts – with Motif. To have a zoo. Others are using GTK+2 or GTK+3. I think I'll have an eye on this and be making some tests on purpose. -- Greetings Pete Progress (n.): Process through which USENET evolved from smart people in front of dumb terminals to dumb people in front of smart terminals.