Byobu in fedora hasn't been updated in a while. The current fedora version is 4.4, while upstream has moved on to 5.17. That's quite a lag we have. There's a bug filed requesting an update by Upstream release monitoring, but it hasn't received any human responses at all! It was filed in October 2011. Since I use byobu, 24x7, I've gone ahead and taken the initiative to update the package and submit the specto the maintainer in the bug. I hope to see it updated soon. I've done a scratch build, you can use the noarch package if you are in a hurry like me. The srpm is available here, so you can build it for your fedora version too.