KNIME 3 - tab-navigation does not work anymore

I checked it for the 'Row Filter' node (and detected it when testing a configuration dialog of one of our nodes). In KNIME 2.12 I was able to navigate through the whole configuration dialog with the TAB-key. In KNIME 3.0.1 it is not possible anymore.

I am running KNIME on MacOS 10.9.

Is that due to Java 8 under MacOS?

Same problem here with KNIME 3.0.1 and Windows 7. Using the tab key is doing something but nothing what makes sense.