We can’t help if we can’t see it: your link is returning a 404 message.

My guess would be because it’s generating a newer (+1.3) version of pdf, and therefore the transparency borders show. They do not print however – do the ones you’re seeing?

Id post the picture again but I cant seem to find how to attach an image to a response.The problem only seems to happen with preview and not acrobat so Im sure your right about it generating a newer version of pdf.

Thanks alot.

This is a phenomenon called stitching and can often be seen in Acrobat if you have smoothing turned on in Preferences. Even with a PDF X1-A. Turn off smoothing, it goes away. I have heard of very few instances of these lines printing…
peace

Indeed Paul, they will sometimes print, especially on injects – depending on the source application you’re printing from, so look at your proofs carefully. I don’t think there is a “fix” for this as far as I know. (and that’s not far)

There’s no fix I know of but in my experience (I’ve sent out a lot of ID pdfs) I haven’t had a printing problem. But I do not have an inkjet…
peace

Right, I’ve only had them print once or twice, out of maybe 2000, only on an inkjet*.