Thanks for pointing me to the videos. I watched them. It seems like detaching a tab is done by dragging the tab while keeping the mouse button depressed. However, my tabs are occasionally detaching when I just click the tab. Maybe I'm making a micro-drag gesture or something, but it's quite annoying.
I'm on a Mac using OSX Lion. The black tabs phenomenon happens when I unplug from a Dell monitor and then plug back in. It only happens sometimes. To fix it, I have to totally quit Oxygen and restart it.
Tom