With your older version, holding the escape key would close the application. In your QT release, it no longer does this. So yeah, having a simple hardware key to refresh would be a nice treat.
Also, it would be great if you could add icons for DC as well.
I did run into a horrible bug today. I'm not sure if I can reproduce it though. I went to Tools->Accounts and tried to change the notification settings. It didn't bring that window up for some reason. Nothing at all after that was there a way for me to be able to kill DC. A reboot didn't even do the trick. Finally it took like a 3rd reboot to be able to get DC back to normal. Not sure what happened during all of that.
Anyway, would you ever consider playing a chosen audio file for notifications as well? Other than that, I think this version is perfect in so many ways. Thank you so very much for releasing this Edward.