I'm Using KDE 4.8.5 in Fedora 17. My configuration removes the scroll bar, tool bar and menu bar. When I try to maximize Emacs, it occupies 99% of the screen, but I still see the desktop in the remaining edges. This bug doesn't seem to happen when the toolbar, scroll bar and menu bar are displayed. In GNU Emacs 24.1.1 (i686-redhat-linux-gnu, GTK+ Version 2.24.10) of 2012-07-13 on x86-18.phx2.fedoraproject.org Windowing system distributor `Fedora Project', version 11.0.11202000 Configured using: `configure '--build=i686-redhat-linux-gnu' '--host=i686-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/lib' '--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' '--with-gpm=no' '--with-wide-int' 'build_alias=i686-redhat-linux-gnu' 'host_alias=i686-redhat-linux-gnu' 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables' 'LDFLAGS=-Wl,-z,relro '' 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: nil locale-coding-system: utf-8-unix default enable-multibyte-characters: t Major mode: Lisp Interaction Minor modes in effect: drag-stuff-global-mode: t drag-stuff-mode: t autopair-mode: t autopair-global-mode: t global-auto-complete-mode: t auto-complete-mode: t show-paren-mode: t global-undo-tree-mode: t undo-tree-mode: t recentf-mode: t global-linum-mode: t linum-mode: t global-auto-revert-mode: t cua-mode: t yas/global-mode: t yas/minor-mode: t display-time-mode: t tooltip-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-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 r t p o r t Recent messages: Loading /usr/share/emacs/site-lisp/site-start.d/focus-init.el (source)...done Loading /usr/share/emacs/site-lisp/site-start.d/php-mode-init.el (source)...done Loading /usr/share/emacs/site-lisp/site-start.d/rpm-spec-mode-init.el (source)...done Battery status not available [yas] Reloaded everything.... Loading /home/roey/.recentf...done Loading /home/roey/.emacs-custom.el (source)...done For information about GNU Emacs and the GNU system, type C-h C-a. Load-path shadows: