Stuart Herbert is looking for some more input on a different sort of question (one that I can't say I've seen asked before) - what are some of the issues with default Linux distribution PHP installs.
Most Linux distributions ship with packages for PHP, but not everyone is happy with these packages. If you're not happy with the PHP packages for a specific Linux distro (no matter how obscure), I'd love to hear what you think the problems are and (if possible) what the correct solution should be.
Just leave a comment on the post with the things you might have noticed. Comments already made reference issues in Debian/Ubuntu, RedHat and a few other more general "state of PHP packages" comments too.