TYPO3 Core

When trying to create a new "News Category" record in the list module, the following Exception is thrown:

#1: PHP Catchable Fatal Error: Argument 1 passed to TYPO3\CMS\Backend\Tree\AbstractTree::setNodeRenderer() must be an instance of
t3lib_tree_renderer_Abstract, instance of TYPO3\CMS\Core\Tree\TableConfiguration\ExtJsArrayTreeRenderer given, called in
C:\xampp\htdocs\currenttruk\typo3\sysext\backend\Classes\Form\Element\TreeElement.php on line 91 and defined in
C:\xampp\htdocs\currenttrunk\typo3\sysext\backend\Classes\Tree\AbstractTree.php line 7

This happens with current TYPO3-Core from Git (6.0-dev) and current Git-Version from tx_news (but seems to be a bug in the core, since the extension only tries to use a field-type from TCA).