Be good enough to update us if/when you get a response. I agree that the lack of official reply is worrisome
Perhaps that(emailing support@obsidian.net) is what people should do instead of posting to this forum to make Obsidian realize that this is a quite widespread problem.
It would be nice if someone from Obsidian would acknowledge this problem somehow. Maybe because the topic title is so unclear this doesnt seem like a major problem? Perhaps we need to create a new topic with a more clear title.
I also sent an email to Obsidian support, but there's been no actual reply yet.
I have the same problem. It works fine on my native Macbook pro retina display, but when I connect it to my external Dell display all I get is music, mouse pointer and a black screen.
2013 15" rMBP connected to Dell U2713HM monitor.
(Yes, I basically copy-pasted those lines from earlier posts because I have the EXACT same problem!!)