Comment 4 for bug 1301842

I couldn't reproduce that bug. I even changed the duration of wallpaper changes to 120 seconds (from default 1795 which is about 30 minutes) and then to 90 seconds.

This install is fully updated.

$ apt-cache policy unity
unity:
  Zainstalowana: 7.2.0+14.04.20140423-0ubuntu1.2
  Kandydująca: 7.2.0+14.04.20140423-0ubuntu1.2
  Tabela wersji:
 *** 7.2.0+14.04.20140423-0ubuntu1.2 0
        500 http://ftp.vectranet.pl/ubuntu/ trusty-updates/main amd64 Packages
        500 http://ftp.vectranet.pl/ubuntu/ trusty-security/main amd64 Packages
        100 /var/lib/dpkg/status
     7.2.0+14.04.20140416-0ubuntu1 0
        500 http://ftp.vectranet.pl/ubuntu/ trusty/main amd64 Packages

$ apt-cache policy gnome-screensaver
gnome-screensaver:
  Zainstalowana: 3.6.1-0ubuntu13
  Kandydująca: 3.6.1-0ubuntu13
  Tabela wersji:
 *** 3.6.1-0ubuntu13 0
        500 http://ftp.vectranet.pl/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

$ dbus-monitor --session "interface='org.gnome.ScreenSaver'"
signal sender=org.freedesktop.DBus -> dest=:1.259 serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired
   string ":1.259"
signal sender=:1.21 -> dest=(null destination) serial=11277 path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=ActiveChanged
   boolean true
signal sender=:1.21 -> dest=(null destination) serial=11309 path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=ActiveChanged
   boolean false