OK, a few questions. First, does the warping only appear on the blue background pages of the book? Second, where in the UK are you? Approximately. I'm up on the east coast of Scotland (near Dundee), and every Eclipse Phase book printed after the split from Wild Fire (when Posthuman went to their new printer, which is the 3rd Printing of the Core, 2nd Printing of Sunward, and everything else) has warping on the outer edge of every blue background page. Which means that any page that is fluff has warping. The white/beige background pages (rules/crunch) are just fine, perfectly crisp. This doesn't seem to be a batch problem, it has been happening since the change to the latest printer. My guess is that the ink on the blue pages is reacting to something, either on the journey to the UK or while they are actually here. In my experience there isn't anything you can do to fix it on your part, and the few times I have tried asking the developers about it I haven't had a response (I haven't really tried properly, though). I have 4 copies of the 3rd Printing Core rulebook (don't ask) and all of them have this issue. All of them were purchased in three month intervals. My copy of Gatecrashing, Panopticon and Rimward also have this issue. My PoD products that I bought from DTRPG do not, nor does my 1st Printing Core or my 1st Printing Sunward.

Oh, all of mine seem to have that to a varying degree. Actually now that I check my other RPG books, they all have some level of wavyness in the pages, especially the hardbacks. My novels, whether hardbacks or paperbacks, not so much.