Comment 9 for bug 773034

In my quick analysis,

 * If you erase /etc/fonts/conf.d/90-synthetic.conf , problem goes away.
   * 90-synthetic.conf provides "bold" settings for Xft applications (including LibO).
   * If you comment-out below, problem goes away. But "selected" hi-light will be shown at regular, not bold.
-----------------------------------------------------
                <!--
                 set weight to bold
                 needed for applications using Xft directly, e.g. Firefox, ...
                -->
                <edit name="weight" mode="assign">
                        <const>bold</const>
                </edit>
-----------------------------------------------------

However, firefox's bold are not problematic. So, this problem is not only fonfconfig settings.

Root problem(s) are LibO's code(maybe).
But, be still in the dark, we can workaround this problem with fontconfig settings.