I have an older installation of WP (2.0.1). I'd like to upgrade to 2.3. However, when I've tried to upgrade in the past, my entire blog would break, I'd have to call my host (they've always been gracious), and they'd have to restore my blog back to an earlier "backup." It has been extremely frustrating, to the point where I'm anxious about doing it again.
Yet I tried to do it today. I actually have another domain to which I tried to copy everything from the blog with the old installation to a new domain with what I thought was the new installation. A support person from my host company walked me through it. It appeared to work for a second, until I discovered the pages weren't redirecting. He wasn't versed on WP, so he didn't know what files did what in terms of attempting to redirect my pages.
So I deactivated my plugins, deactivated my highly customized theme, activated the default WP theme, and attempted an upgrade. Needless to say, my blog broke again, and the support person is now restoring my blog - again.
Can anybody help me with this? I'd like to learn how to upgrade my WP installations without having my blog break and having to call my host provider each time.