diff --git a/0001-Resolves-rhbz-670020-crash-in-slidesorting.patch b/0001-Resolves-rhbz-670020-crash-in-slidesorting.patch
new file mode 100644
index 0000000..e886a8b
--- /dev/null
+++ b/0001-Resolves-rhbz-670020-crash-in-slidesorting.patch
@@ -0,0 +1,26 @@
+From 48f4f5f4283cb9a58223c6cc6f4d0ebadce53722 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
+Date: Wed, 2 Feb 2011 16:05:01 +0000
+Subject: [PATCH] Resolves: rhbz#670020 crash in slidesorting
+
+---
+ sd/source/ui/view/drviews1.cxx |    3 +++
+ 1 files changed, 3 insertions(+), 0 deletions(-)
+
+diff --git a/sd/source/ui/view/drviews1.cxx b/sd/source/ui/view/drviews1.cxx
+index d1acb96..e0b220e 100644
+--- a/sd/source/ui/view/drviews1.cxx
++++ b/sd/source/ui/view/drviews1.cxx
+@@ -712,6 +712,9 @@ SdPage* DrawViewShell::getCurrentPage() const
+ 
+ void DrawViewShell::ResetActualPage()
+ {
++    if (!GetDoc())
++        return;
++
+     USHORT nCurrentPage = maTabControl.GetCurPageId() - 1;
+     USHORT nPageCount	= (meEditMode == EM_PAGE)?GetDoc()->GetSdPageCount(mePageKind):GetDoc()->GetMasterSdPageCount(mePageKind);
+     if (nPageCount > 0)
+-- 
+1.7.4
+
diff --git a/libreoffice.spec b/libreoffice.spec
index 315ea47..9649f71 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -112,6 +112,7 @@ Patch24: 0001-Related-rhbz-672872-cancel-gtk-file-dialog-on-deskto.patch
 Patch25: vbahelper.visibility.patch
 Patch26: 0001-Resolves-fdo-33509-i62414-out-by-one-breaks-CTL-spel.patch
 Patch27: 0001-Resolves-rhbz-673819-crash-on-changing-position-of-d.patch 
+Patch28: 0001-Resolves-rhbz-670020-crash-in-slidesorting.patch
 
 %{!?python_sitearch: %global python_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1))")}
 %define instdir %{_libdir}
@@ -742,6 +743,7 @@ mv -f redhat.soc extras/source/palettes/standard.soc
 %patch25 -p0 -b .vbahelper.visibility.patch
 %patch26 -p1 -b .fdo33509-i62414-out-by-one-breaks-CTL-spel.patch
 %patch27 -p1 -b .rhbz673819-crash-on-changing-position-of-d.patch 
+%patch28 -p1 -b .rhbz670020-crash-in-slidesorting.patch
 touch scripting/source/pyprov/delzip
 touch scripting/util/provider/beanshell/delzip
 touch scripting/util/provider/javascript/delzip
@@ -2087,11 +2089,12 @@ update-desktop-database %{_datadir}/applications &> /dev/null || :
 %{basisinstdir}/program/kde-open-url
 
 %changelog
-* Sun Jan 30 2011 Caolán McNamara <caolanm@redhat.com> 3.3.0.4-3
+* Wed Feb 02 2011 Caolán McNamara <caolanm@redhat.com> 3.3.0.4-3
 - Related: rhbz#610103 make this even more robust
 - Related: rhbz#672872 cancel gtk file dialog on terminate
 - Resolves: fdo#33509/ooo#62414 fix CTL spelling popup
 - Resolves: rhbz#673819 crash on changing position of header/footer object
+- Resolves: rhbz#670020 crash in slidesorting
 
 * Mon Jan 24 2011 Caolán McNamara <caolanm@redhat.com> 3.3.0.4-2
 - Resolves: rhbz#671540 fix lonely )