diff -ru sd.orig/source/ui/func/fupage.cxx sd/source/ui/func/fupage.cxx
--- sd.orig/source/ui/func/fupage.cxx	2010-02-12 14:18:44.000000000 +0000
+++ sd/source/ui/func/fupage.cxx	2010-02-12 15:39:15.000000000 +0000
@@ -87,6 +87,7 @@
 #include "undoback.hxx"
 #include "sdabstdlg.hxx"
 #include "sdresid.hxx"
+#include "sdundogr.hxx"
 #include "helpids.h"
 
 namespace sd {
@@ -391,10 +392,43 @@
 
 			if( mbMasterPage )
 			{
-				StyleSheetUndoAction* pAction = new StyleSheetUndoAction(mpDoc, (SfxStyleSheet*)pStyleSheet, &(*pTempSet.get()));
-				mpDocSh->GetUndoManager()->AddUndoAction(pAction);
-				pStyleSheet->GetItemSet().Put( *(pTempSet.get()) );
-				pStyleSheet->Broadcast(SfxSimpleHint(SFX_HINT_DATACHANGED));
+				String aComment(SdResId(STR_UNDO_CHANGE_PAGEFORMAT));
+				SfxUndoManager* pUndoMgr = mpDocSh->GetUndoManager();
+				pUndoMgr->EnterListAction(aComment, aComment);
+				SdUndoGroup* pUndoGroup = new SdUndoGroup(mpDoc);
+				pUndoGroup->SetComment(aComment);
+
+				//Set background on all master pages
+				USHORT nMasterPageCount = mpDoc->GetMasterSdPageCount(ePageKind);
+				for (USHORT i = 0; i < nMasterPageCount; ++i)
+				{
+					SdPage *pMasterPage = mpDoc->GetMasterSdPage(i, ePageKind);
+					SdStyleSheet *pStyle =
+						pMasterPage->getPresentationStyle(HID_PSEUDOSHEET_BACKGROUND);
+					StyleSheetUndoAction* pAction =
+						new StyleSheetUndoAction(mpDoc, (SfxStyleSheet*)pStyle, &(*pTempSet.get()));
+					pUndoGroup->AddAction(pAction);
+					pStyle->GetItemSet().Put( *(pTempSet.get()) );
+					pStyle->Broadcast(SfxSimpleHint(SFX_HINT_DATACHANGED));
+				}
+
+				//Remove background from all pages to reset to the master bg
+				USHORT nPageCount(mpDoc->GetSdPageCount(ePageKind));
+				for(USHORT i=0; i<nPageCount; ++i)
+				{
+					SdPage *pPage = mpDoc->GetSdPage(i, ePageKind);
+					if (SdrObject *pObj = pPage->GetBackgroundObj())
+					{
+						SdBackgroundObjUndoAction *pBackgroundObjUndoAction =
+							new SdBackgroundObjUndoAction(*mpDoc, *pPage, pObj);
+						pUndoGroup->AddAction(pBackgroundObjUndoAction);
+						pPage->SetBackgroundObj(NULL);
+						pPage->ActionChanged();
+					}
+				}
+
+				pUndoMgr->AddUndoAction(pUndoGroup);
+				pUndoMgr->LeaveListAction();
 			}
 
 			const SfxPoolItem *pItem;