User blog comment:Kirkburn/Technical Update: May 18, 2015/@comment-1929113-20150519162254/@comment-126761-20150519163824

The inconsistency may be a caching issue?

It's been mentioned on the main blog post about the change, but there are a couple of reasons for this change - such as better consistency between device types (so articles can be designed in a more reliable fashion), and because once you go beyond a certain point, lines of text become harder and harder to read. At some point you need to limit it - we feel that the old layout went far beyond that.

Though it can cause some issues for big tables - these are problems that already existed for many visitors on smaller screens. The update should help ensure future page layouts work across all devices.