Why does my blog keep breaking?

So it’s 2 days into blog redesign, and two disasters.
Luckily, there is pretty low traffic (read: none. hellooo?) so I had time to fix. One php error, check. One database error, check. I hope it isn’t going to be a problem with this theme, because I think it looks pretty nice. I’m probably going to migrate my whole site over to this blog as you can see most of it is already available here from the links on the right.
So far i’m learning some valuable php and SQL skills…and i’ve got that going for me…which is nice.