I have layered Indesign shapes (with 95% opacity) atop a black and white JPG (100% opacity). When I export the file as a PDF and open it in Acrobat, the background image bleeds under the shapes. The amount of bleed varies depending on the zoom level in Acrobat. In Indesign, the background image does not bleed under the shape (they are both the same size in pixels). How do I keep this problem from appearing when I export?
In the images below, you can see a thin gray strip from the JPG protruding from the bottom of the light blue.
This might be a result of jpeg compression. Does it happen if you switch to zip?
Tried zip compression. The problem persists.