Parallel Programs Dependency Issue
There is another problem you haven't considered: When there are already vital packages installed (like xorg) that require the newer version of the programm (like gcc-4.x).
Is there a way to tell pacman to install the older version (in my case gcc-3.x) parallel to the newer version, thus not hurting any dependencies?
Sometimes the only way to make something work is to make sure that the dependency's version is downward compatible. If it isn't, then the older version of the program itself needs to be adjusted to work, and that is something that programmers are obviously not likely to do.
Keeping two or more versions of a particular program installed is possible in many cases.
In any case, it appears that the only accurate information we have on pacman is found at "man pacman" and "man pacman.conf" from the command line. Perhaps you will find the proper procedure there. KitchM 13:09, 6 August 2009 (EDT)
The article fails to explain what to do when the system no longer boots in a usable manner and the user cannot get to the command prompt. None of the mentioned suggestions will work then. Even if one uses the install disk, the same problem applies. - KitchM 00:08, 22 October 2009 (EDT)
Arch Rollback Machine
The "How-To" sections seems to really just be about the Arch Rollback machine. It's a little confusing (at least somehow I missed it, when trying to figure out how to use ARM). Perhaps there should be a separate section about the ARM, with the How-To as a subsection? Or at lest the How-To should be called, How-To Use the Arch Rollback Machine?