M-x causing vertical window shrinkage

[Burton Samograd <burton.samograd@markit.com>]

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Hello,

I did a trunk pull of emacs bzr today (Sept 14, 2012) and did a full build on Ubuntu Server 12.04LTS in a VM after doing an 'apt-get build-dep emacs'.  When I run emacs using the Cygwin X server for display on my windows host, every time I do an M-x on an un-maximized window the window shrinks by 1 row in size.

Here is the final output of my ./configure:

Configured for `x86_64-unknown-linux-gnu'.

  Where should the build process find the source code?    /home/burton/emacs-bzr/devel
  What compiler should emacs be built with?               gcc -std=gnu99 -g3 -O2
  Should Emacs use the GNU version of malloc?             yes
      (Using Doug Lea's new malloc from the GNU C Library.)
  Should Emacs use a relocating allocator for buffers?    no
  Should Emacs use mmap(2) for buffer allocation?         no
  What window system should Emacs use?                    x11
  What toolkit should Emacs use?                          GTK
  Where do we find X Windows header files?                Standard dirs
  Where do we find X Windows libraries?                   Standard dirs
  Does Emacs use -lXaw3d?                                 no
  Does Emacs use -lXpm?                                   yes
  Does Emacs use -ljpeg?                                  yes
  Does Emacs use -ltiff?                                  yes
  Does Emacs use a gif library?                           yes -lgif
  Does Emacs use -lpng?                                   yes
  Does Emacs use -lrsvg-2?                                yes
  Does Emacs use imagemagick?                             no
  Does Emacs use -lgpm?                                   yes
  Does Emacs use -ldbus?                                  yes
  Does Emacs use -lgconf?                                 yes
  Does Emacs use GSettings?                               yes
  Does Emacs use -lselinux?                               no
  Does Emacs use -lgnutls?                                yes
  Does Emacs use -lxml2?                                  yes
  Does Emacs use -lfreetype?                              yes
  Does Emacs use -lm17n-flt?                              yes
  Does Emacs use -lotf?                                   yes
  Does Emacs use -lxft?                                   yes
  Does Emacs use toolkit scroll bars?                     Yes

Window shrinkage does not occur in a maximized window.

I apologize for the footer on my message as it is automatically  added by our company mail servers and I cannot turn it off.

--
Burton Samograd

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