Unwanted white gutter added around each page after upload.
I've been creating 8.5" x 8.5" books for a couple years now, but when I uploaded the latest version this time around it added a while gutter around each page leaving a white gap between my full-page images and the edge of the page.
For example, here's a screenshot of the PDF before i uploaded it (link to actual file parenthesis):
And here it is after:
But what's odd is this is the exact same template I've used before. All I did was swap out images and change text. But the old proofs from past projects don't show the gutter:
Even when I upload my PDFs from old versions (the ones I created and uploaded), the proofs now come back with the gutter.
Any ideas? Something appears to have changed since I last used Lulu and I don't know how to adjust to make sure my full-page images do in fact go edge-to-edge when printed.