I'm currently running Scribus 1.5.3 on Ubuntu and need to push to 1.5.4. Here's what's in my PPA
http://ppa.launchpad.net/scribus/ppa/ubuntu
When I do an update - upgrade I'm still at 1.5.3
Thanks,
Wayne
if you want to get the very latest scribus from the PPA you have to install scribus-trunk and not scribus-ng (which is the latest development release: currently, 1.5.3)