### Eclipse Workspace Patch 1.0
#P sophie
Index: modules/org.sophie2.main.app.commons/src/main/java/org/sophie2/main/app/commons/element/CopyUtil.java
===================================================================
--- modules/org.sophie2.main.app.commons/src/main/java/org/sophie2/main/app/commons/element/CopyUtil.java	(revision 8460)
+++ modules/org.sophie2.main.app.commons/src/main/java/org/sophie2/main/app/commons/element/CopyUtil.java	(working copy)
@@ -73,6 +73,10 @@
 			if (ResourceRefR4.class.equals(key.getValueClass())) {
 				ResourceRefR4 valueRef = (ResourceRefR4)resource.get(key);
 				
+				if (ResourceRefR4.NONE_REF.equals(valueRef)) {
+					continue;
+				}
+				
 				// copy the resource referenced by valueRef
 				ResourceAccess access = resource.getAccess().open(valueRef, null);
 				ResourceModel childModel = capsulate(ResourceH.getHelper(access));
@@ -206,17 +210,19 @@
 		Map<String, Key<?>> deeplyCopiedKeys = ResourceR4.getDeeplyCopiedKeys(clazz);
 		for (Key key : deeplyCopiedKeys.values()) {
 			ResourceRefR4 valueRef = (ResourceRefR4) model.getRaw(key);
-
-			RootKey valueRefChildKey = RootKey.fromRef(valueRef);
-			ResourceModel valueRefModel = model.getSubModel(valueRefChildKey);
 			
-			ResourceRefR4 realValueRef = decapsulate(bookModel, valueRefModel, 
-					valueRef.getThisChildRef(), bookChanger, true);
-			bookChanger.removeResource(realBookToModel.append(valueRef));
+			if (valueRef != null && !ResourceRefR4.NONE_REF.equals(valueRef)) {
+				RootKey valueRefChildKey = RootKey.fromRef(valueRef);
+				ResourceModel valueRefModel = model.getSubModel(valueRefChildKey);
+				
+				ResourceRefR4 realValueRef = decapsulate(bookModel, valueRefModel, 
+						valueRef.getThisChildRef(), bookChanger, true);
+				bookChanger.removeResource(realBookToModel.append(valueRef));				
+				ResourceRefR4 newValue = ResourceRefR4.getRelativeRef(realBookToModel, realValueRef);
 			
-			ResourceRefR4 newValue = ResourceRefR4.getRelativeRef(realBookToModel, realValueRef);
-			ResourceChanger subChanger = bookChanger.getSub(realBookToModel);
-			subChanger.setRaw(key, newValue);
+				ResourceChanger subChanger = bookChanger.getSub(realBookToModel);
+				subChanger.setRaw(key, newValue);
+			}
 		}
 		
 		// decapsulate the children of the given resource
Index: modules/org.sophie2.base.model.book/src/main/java/org/sophie2/base/model/book/interfaces/StyledElement.java
===================================================================
--- modules/org.sophie2.base.model.book/src/main/java/org/sophie2/base/model/book/interfaces/StyledElement.java	(revision 8460)
+++ modules/org.sophie2.base.model.book/src/main/java/org/sophie2/base/model/book/interfaces/StyledElement.java	(working copy)
@@ -8,6 +8,7 @@
 import org.sophie2.base.model.book.frame.ImmInsets;
 import org.sophie2.base.model.resources.r4.ResourceRefR4;
 import org.sophie2.base.model.resources.r4.keys.CompositeKey;
+import org.sophie2.base.model.resources.r4.keys.DeeplyCopied;
 import org.sophie2.base.model.resources.r4.keys.TemplatedKey;
 import org.sophie2.base.model.resources.r4.keys.TemplatedResourceRefKey;
 import org.sophie2.base.persistence.commons.PersistenceOptions;
@@ -82,6 +83,7 @@
 	 * The image used as a background. Used when the background type is
 	 * <code>image</code>.
 	 */
+	@DeeplyCopied
 	public static final TemplatedResourceRefKey KEY_BACKGROUND__IMAGE =
 		new TemplatedResourceRefKey("background:image", ResourceRefR4.class, ResourceRefR4.NONE_REF) {
 			@Override