Yeah, it was the enemy page (pg 5) and the arty page (pg 3) also.
I do think it works very well for the background, and just decreasing the transparency of the boxes behind the text would probably work fine to make it easier to read.
On page 3 the text box on the bottom also had some effects on it/the background that made it hard to read, but interestingly it is no longer a problem when reading on my phone! The inverted colour rectangles are only showing up as solid opaque rectangles.