Python Client: Flash Player Launches in New Window

I'm running Xibo Server 1.6.3; client 1.6.0-rc2. I'm seeing an issue that I've seen a couple of people mention where Flash content is not being displayed embedded in the client, but starts in a new window. In particular, I'm trying to embed Ustream.tv content, which (apprently) requires either the flash plugin or a dedicate app. It seems like they might have some sort of HTML5 client that doesn't require a plugin, but only for Smart Phones? Anyway, when I embed the video from Ustream.tv it shows up as a new window.

I'm seeing this on two different systems:
- Ubuntu 12.04 32-bit, Dell Precision with nVidia Graphics card.
- Ubuntu 14.04 64-bit, LIVA Mini-PC with Intel HD Graphics card.

Any hints as to how to get this to embed properly would be appreciated; or, alternatively, how to force Ustream to use flashless video technology.