After a long time being held back by Android 2.1, the D3 recently got an upgrade to version 2.3, usually referred to as Gingerbread by the cool kids.
It should make the device faster, more responsive, and improve system stability. Of course Cowon also packed in some new functionality (sleep timer, plug-in codec support, search widget, VoIP) and fixed some bugs under the hood.
Proud D3 owners, head on over to Cowon Global to download the update and give your player a serious boost in usability.
Thanks to Copperface for the tip.