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.ide/src/org/eclipse/ui/views/navigator/NavigatorDropAdapter.java
/**
     * Adds the given status to the list of problems.  Discards
     * OK statuses.  If the status is a multi-status, only its children
     * are added.
     */
    private void mergeStatus(MultiStatus status, IStatus toMerge) {
        if (!toMerge.isOK()) {
            status.merge(toMerge);
        }
    }
    /**
     * Returns an status indicating success.
     */
    private IStatus ok() {
        return new Status(IStatus.OK, PlatformUI.PLUGIN_ID, 0,
                ResourceNavigatorMessages.DropAdapter_ok, null);
    }
    /**
     * Opens an error dialog if necessary.  Takes care of
     * complex rules necessary for making the error dialog look nice.
     */
    private void openError(IStatus status) {
        if (status == null) {
			return;
		}
        String genericTitle = ResourceNavigatorMessages.DropAdapter_title;
        int codes = IStatus.ERROR | IStatus.WARNING;
        
        if (!status.isMultiStatus()) {
            ErrorDialog