Still happening for me (reporting here instead of #1083532, which seems to be a duplicate). Here follows the dbus output when I select Page Preview from the File menu (seems to be the most likely way to isolate the issue so far). Error seems similar to comment #41 above.

The crux seems to be 
error sender=:1.154 -> dest=:1.62 error_name=org.freedesktop.DBus.Error.UnknownMethod reply_serial=8415
   string "No such interface `org.gtk.Actions' on object at path /window/75497569"


=========[dbus output]=========
method call sender=:1.62 -> dest=:1.154 serial=8413 path=/window/75497569; interface=org.gtk.Actions; member=SetState
   string ".uno:PickList"
   variant       boolean false
   array [
   ]
signal sender=:1.62 -> dest=(null destination) serial=8414 path=/com/canonical/Unity/Panel/Service; interface=com.canonical.Unity.Panel.Service; member=EntryActivated
   string ""
   struct {
      int32 0
      int32 0
      uint32 0
      uint32 0
   }
method call sender=:1.34 -> dest=org.ayatana.bamf serial=5682 path=/org/ayatana/bamf/matcher; interface=org.ayatana.bamf.matcher; member=ActiveWindow
method return sender=:1.38 -> dest=:1.34 reply_serial=5682
   string "/org/ayatana/bamf/window75497569"
method call sender=:1.34 -> dest=org.ayatana.bamf serial=5683 path=/org/ayatana/bamf/window75497569; interface=org.ayatana.bamf.window; member=WindowType
method return sender=:1.38 -> dest=:1.34 reply_serial=5683
   uint32 0
method call sender=:1.34 -> dest=org.ayatana.bamf serial=5684 path=/org/ayatana/bamf/window75497569; interface=org.ayatana.bamf.view; member=Name
method return sender=:1.38 -> dest=:1.34 reply_serial=5684
   string "GIC Project Report.odt - LibreOffice Writer"
error sender=:1.154 -> dest=:1.62 error_name=org.freedesktop.DBus.Error.UnknownMethod reply_serial=8413
   string "No such interface `org.gtk.Actions' on object at path /window/75497569"
method call sender=:1.62 -> dest=:1.154 serial=8415 path=/window/75497569; interface=org.gtk.Actions; member=Activate
   string ".uno:SaveAs"
   array [
   ]
   array [
   ]
error sender=:1.154 -> dest=:1.62 error_name=org.freedesktop.DBus.Error.UnknownMethod reply_serial=8415
   string "No such interface `org.gtk.Actions' on object at path /window/75497569"
method call sender=:1.62 -> dest=org.freedesktop.DBus serial=8416 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
   string "type='signal',interface='ca.desrt.dconf.Writer',path='/ca/desrt/dconf/Writer/user',arg0path='/com/canonical/indicator/datetime/'"
method call sender=:1.62 -> dest=org.freedesktop.DBus serial=8417 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=RemoveMatch
   string "type='signal',interface='ca.desrt.dconf.Writer',path='/ca/desrt/dconf/Writer/user',arg0path='/com/canonical/indicator/datetime/'"
method call sender=:1.62 -> dest=org.freedesktop.DBus serial=8418 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
   string "type='signal',interface='ca.desrt.dconf.Writer',path='/ca/desrt/dconf/Writer/user',arg0path='/com/canonical/indicator/datetime/'"
method call sender=:1.62 -> dest=org.freedesktop.DBus serial=8419 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=RemoveMatch
   string "type='signal',interface='ca.desrt.dconf.Writer',path='/ca/desrt/dconf/Writer/user',arg0path='/com/canonical/indicator/datetime/'"
signal sender=:1.62 -> dest=(null destination) serial=8420 path=/com/canonical/Unity/Panel/Service; interface=com.canonical.Unity.Panel.Service; member=ReSync
   string "libdatetime.so"
method call sender=:1.9 -> dest=:1.62 serial=2250 path=/com/canonical/Unity/Panel/Service; interface=com.canonical.Unity.Panel.Service; member=SyncOne
   string "libdatetime.so"
method return sender=:1.62 -> dest=:1.9 reply_serial=2250
   array [
      struct {
         string "libdatetime.so"
         string "0x83f6afc"
         string "indicator-datetime"
         string "13:43"
         boolean true
         boolean true
         uint32 0
         string ""
         boolean false
         boolean false
         int32 600
      }
   ]

=========[/dbus output]=========

The output of a working window is too long for me to capture from the terminal window output. If it is important for comparison, and if someone can explain how to channel dbus-message output to a temp file, I can try that.