Is there a simple way to install Ruby 1.8.7 on Fedora 11 or 12 without side-stepping the yum/RPM package management system too severely? Building from source is always an option, but it tends to deploy things in irregular places and proves to be more fuss to maintain in the long run.
A self-built RPM is okay, but I'm presuming there's a .rpm out there somewhere already. Rails is not especially happy with 1.8.6 and the Fedora community, for various reasons, considers 1.8.7 to be toxic and best avoided.
One suggestion I've received is to use rvm