If I want to install Scribus on Windows or Mac, I just download and install. Linux is another story:
1. Ubuntu - The Scribus friends PPA only provides trunk builds, and Ubuntu itself is providing an 1.4.2 SVN version. The other repositories only have 1.4.3 and don't support 14.04
2. Fedora 20 - The mrdocs repository has errors and there is no rpm in the directory for Fedora 20
3. Arch Linux - Nothing in AUR for it. (not Arch's fault, more community)