[Mark.B]

I think I need to clear some of this up.

You posted in the support forum asking for help. You then kept bumping the thread demanding answers, often only minutes after your initial request. When you didn't get immediate assistance, you went off and tried to fix your site by trying to restore files from 5.1.10 and running the upgrade script. This messed up your database, and you didn't have a backup.

At some point you also deleted your database and then restored back from a corrupted copy taken after the upgrade, which made things even worse.

Despite this, I offered to try to fix the site up, but it wasn't possible to do. I did however, recover the memberlist. I then offered to install a new copy of the forum for you, and attempt to import that memberlist. This took some time as you had installed add ons so the user table had more columns than the default, meaning I had to do a lot of playing about with it. I was about an hour into sorting this when you deleted the database again rendering my work useless.

Your account doesn't have ticket support, despite this I personally put in several hours of work free of charge to try and get at least part of your site back online, only for you to delete the database while I was in the middle of doing it, which you then said was because I wasn't replying to your ticket. Of course I wasn't, I was frantically trying to get what I could of your site back online.

Our reward for this was you turning up on the support forum swearing all over the place. Swearing, or circumventing the swear filter, is against the rules in the support forums and normally leads to a ban of some sort. One of my colleagues rightly picked this up and closed the thread after warning you to moderate the language. We're not here to be sworn at and abused. End of story.

You need to be patient with support requests. vBulletin has thousands of customers and a limited number of support staff. We are not just sitting around watching the forums or the ticket system in case someone posts something, we are busy working on other customer issues. We are most likely working on several different customers at any one time. We cannot drop what we are doing in order to assist a specific customer.

Additionally, all tickets and forum posts are dealt with in time order - the ones with the oldest last reply get picked up first. So if you keep posting "Why no answer?" in your ticket or thread, all you will actually do is delay any response you receive. Especially when the support person isn't replying because he's busy working on YOUR site! If you've gone 48 hours with no reply, by all means give it a bump, but not before.

In short:
1. There is no problem with 5.2.0. I've installed and upgraded loads of sites already, including my own demo site, with no issue.
2. And this is the important one. If something does go wrong on an upgrade (or anything else), please post for support and then WAIT. Don't decide after ten minutes that you're going to rush off and try and fix it yourself. You will almost certainly break your site and you may end up in a position like this where even support cannot recover it.
3. Don't shout and swear at the support staff of ANY company. They are trying to help you.
4. Never, ever, ever perform an upgrade without a FULL backup of the ENTIRE database and files. If you have that, then no matter bad things get we can always bring your site back for you. Without it, both you and us are screwed.