Thanks @brianteeman

My test this does not work as should here;
If we create a new article with the same Title , alias field empty, in another category than the existing article, then we still get the Warning. (FYI, the alias is not incremented, which is correct)

@infograph768 Thanks, nice catch, seems it need some more logic on the warning. I ll come up with some code.

Maybe something like this:

if (in_array($app->input->get('task'), array('apply', 'save', 'save2new')) && (int) $app->input->get('id') == 0)
        {
            if ($data['alias'] == null)
            {
                if (JFactory::getConfig()->get('unicodeslugs') == 1)
                {
                    $data['alias'] = JFilterOutput::stringURLUnicodeSlug($data['title']);
                }
                else
                {
                    $data['alias'] = JFilterOutput::stringURLSafe($data['title']);
                }

                $table = JTable::getInstance('Content', 'JTable');

                if ($table->load(array('alias' => $data['alias'], 'catid' => $data['catid'])))
                {
                    $msg = JText::_('COM_CONTENT_SAVE_WARNING');
                }

                list($title, $alias) = $this->generateNewTitle($data['catid'], $data['alias'], $data['title']);
                $data['alias'] = $alias;

                if (isset($msg))
                {
                    $app->enqueueMessage($msg, 'warning');
                }
            }

Works fine. One more tester.

@test ok

This comment was created with the J!Tracker Application at http://issues.joomla.org/.

As we have a new string, lets' wait 3.4.0 to merge or merge into 3.4.0dev

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This has been merged into 3.4-dev. Thanks!