I asked this question in another thread on the Lulu froums, but the response was essentially: “Hey this thread is really old,” and “Just muck around with it. You’ll figure it out.”
Well I’ve been mucking around with my cover for almost a month now. I hired a graphic designer to do a beautiful wrap-around cover complete with spine art and custom lettering. It was done to the exact specifications for an A5 Paperback. I ordered my proof copy and got this:


As you can see, the spine is creeping onto the front cover and the back cover is creeping onto the spine. There’s clearly some misalignment here somwhere.
I’ve read everything I can on the subject. Nothing on the forums or on the site proper has helped. My designer has tinkered with it ad nauseum. I’ve tinkered with it ad nauseum and neither of us can figure out what the heck the problem is. We’ve tried trimming the left-most edge of the back cover by a milimitre or two. We’ve tried adjusting the width of the spine, the size of the art on the spine. We’ve even tried moving the spine and front cover a bit to the right or left but no matter what we do, it just won’t line up.
I keep getting this:

Yes, that’s a small image. That’s all I have to work with because I can’t figure out any way to make it bigger and see what the heck I’m doing. I think what I’m seeing here is that the spine is now creeping onto both the back and front cover. This is only one of the many, many, many misaligned iterations. The best we’ve been able to do is a one milimeter creep to the right.
I’m at my wit’s end, my friends. Please help me. I’m out of ideas to try and I’m so frustrated I could scream. I really want to put out a high-quality product.