After upgrading to Ubuntu 14.04, the thin black borders that appear around pages in evince have disappeared. Now, when I'm reading a pdf file in evince, the pages appear white against a background that's very slightly pink, but without the page border you have to squint to see the boundary between the page and the background. The result when viewing documents in continuous mode is that there appear to be big chunks of needless white space in the middle of the document (where in fact there is merely a page boundary), and it looks rather odd.
I don't want to turn off continuous mode, and apart from this I think evince is brilliant, so I'd be very reluctant to change pdf viewer.
Is this change in appearance caused by the new default theme in 14.04 (with its lack of borders)? What can I do to get back my bordered documents?