Any ideas as to why Google changed search result margins?
robin_reala: Well thought out gutters can make a big difference to the readability of a page, but that generally is only a big factor when it comes to pages with lots of data crammed into multiple columns; not something you’d assume would be a problem on a Google results page. My best guess is that (like the aforementioned shades-of-blue incident) they did a whole bunch of user testing that suggested that the usability and probably profitability of the page went up by a couple of percent with that precise amount of extra margin.