It means that particular build failed. Shouldn't matter though because it was a 0.23.0 build for Maverick. Maverick shipped with a newer version (0.23.1). All Mythbuntu supported releases have newer versions available now anyway, so you might want to try those. I doubt you can even get that version anymore. Everything should have a newer version available and the only thing that has failed to build lately was the 0.24 mythplugins
It means that particular build failed. Shouldn't matter though because it was a 0.23.0 build for Maverick. Maverick shipped with a newer version (0.23.1). All Mythbuntu supported releases have newer versions available now anyway, so you might want to try those. I doubt you can even get that version anymore. Everything should have a newer version available and the only thing that has failed to build lately was the 0.24 mythplugins