On my tablet, I only have video podcast subscriptions. So DC has never played an audio file. The widget normally displays the current audio file, but in my case it is just a big gray box with just a play and skip button, which don't do anything since there is no audio file loaded.
In this case you should at least display a logo or something in the widget.
Yup, good idea, I created an issue for this - http://mantis.snoggdoggler.com/view.php?id=1322
Thanks for the feedback.