Straight to the point:
Stop wasting your time installing c5, we'll do it for you in our super sweet hosting environment for just $15/month. No hidden fees or startup costs!
http://www.getconcrete5.com/get_started/

Longer explanation:
There's a very small handful of people who are paid to support this software. As I'm sure you know, the software is free, so the only revenue we get is consulting, merchandise sales, and hosting!

I'm sure you will understand then why as CEO of c5 I have to pull the plug on having my team personally debug c5 installs on every server setup under the sun. The last few weeks we've found more and more of our time going into getting c5 running on super-budget hosts and windows boxes neither of which we ever thought was a good idea in the first place. Deep down, we love helping people get on the web and of course we want as many people using c5 as we can get.

It is because we want to help the largest majority of people with the biggest problems that we've come to the decision that we can no longer personally pay attention to the installation forum every day. There is a good group of very smart volunteers who we dearly hope will continue to give their time helping others here. If one of those folks brings an idea or change to us around the install process we can easily implement, we'll be happy to do it. Beyond that we're simply killing ourselves debugging everyone's unique server setup by hand. I hear the frustration: "Hey I want to use your software and you won't help me?!?" Actually, that's not true

We're announcing we've slashed our basic hosting plan in half, and eliminated startup fees onhttp://GetConcrete5.com. For $15/month we'll gladly setup c5 for you, give you complete access, we're even going to upgrade your site with the latest stable codebase whenever it's made available. Frankly I think that's a deal you can't beat. We'll help you, the hosting revenue will help us, everyone wins.

By all means I encourage ongoing discussion around installation issues. I know there are intranets, other web hosts, any number of very valid reasons you might not want to host with us. But if you really feel like you need to find a cheaper deal some where else, please don't give us attitude for not helping you pull that off.

Thanks for your continued passion and excitement, we're gonna go back to thinking about the big picture again.
-frz
ceo, c5.