Bug 312540 [LinkedResources] Copy resource in Navigator and Project Explorer always shows dialog
N20100511-2000. When copying an IFile from one to another folder in the Navigator or Project Explorer, I always get the dialog no matter how I've set the preferences on the 'Linked Resources' page (even if I disable linked resources).
bundles/org.eclipse.ui.navigator.resources/src/org/eclipse/ui/navigator/resources/ResourceDropAdapterAssistant.java
if (LocalSelectionTransfer.getTransfer().isSupportedType(transferType)) {
			IResource[] selectedResources = getSelectedResources();
			
			boolean bProjectDrop = false;
			for (int iRes = 0; iRes < selectedResources.length; iRes++) {
				IResource res = selectedResources[iRes];
				if(res instanceof IProject) {
					bProjectDrop = true;
				}
			}
			if(bProjectDrop) {
				
				
				message = WorkbenchNavigatorMessages.DropAdapter_canNotDropProjectIntoProject;
			} else {
				if (selectedResources.length == 0) {
					message = WorkbenchNavigatorMessages.DropAdapter_dropOperationErrorOther;
				} else {
					CopyFilesAndFoldersOperation operation;
					if (aDropOperation == DND.DROP_COPY) {
						if (Policy.DEBUG_DND) {
							System.out
									.println("ResourceDropAdapterAssistant.validateDrop validating COPY."); 
						}
	
						operation = new CopyFilesAndFoldersOperation(getShell());
					} else {
						if (Policy.DEBUG_DND) {
							System.out