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
currentTransfer)) {
            resources = (IResource[]) data;
        } else if (FileTransfer.getInstance().isSupportedType(currentTransfer)) {
            status = performFileDrop(data);
            result = status.isOK();
        } else {
            result = NavigatorDropAdapter.super.performDrop(data);
        }
        if (resources != null && resources.length > 0) {
            if (getCurrentOperation() == DND.DROP_COPY) {
				status = performResourceCopy(getShell(), resources);
			} else {
				status = performResourceMove(resources);
			}
        }
        openError(status);
        return result;
    }
    /**
     * Performs a drop using the FileTransfer transfer type.
     */
    private IStatus performFileDrop(Object data) {
        MultiStatus problems = new MultiStatus(PlatformUI.PLUGIN_ID, 0,
                ResourceNavigatorMessages.DropAdapter_problemImporting, null);
        mergeStatus(problems, validateTarget(getCurrentTarget(),
                getCurrentTransfer()));
		final int currentOperation= getCurrentOperation();
        final IContainer target = getActualTarget((IResource) getCurrentTarget());
        final String[] names = (String[]) data;