User blog comment:Rappy 4187/Technical Update: August 31, 2015/@comment-1824272-20150901213413/@comment-5275700-20150903153301

@Digifiend + SlyCooperFan1

The updated layout is currently only applied to articles (main namespace pages) but we'll be rolling it out to the rest of the page types in the coming months. The older mobile design will be fully retired, and the newer design will continue to evolve.

The update next week will be specific to main pages on mobile. Going forward, templates used on articles should be optimized for the new layout.

@Digifiend

The overlapping lines issue is only seen when viewing the mobile layout in a desktop browser (at "desktop" width). I'm not seeing that on any phone or if I reduce the desktop browser window to "phone" width. If you see the issue on your phone, please send in a bug report with screen shots.

Tabber has never worked on mobile, this is an issue we continue to examine. It's intentional that image size and inline styling is ignored, because in most cases those specifications are tailored only for desktop and result in a broken layout on mobile. Those of you who have done work to make them mobile-friendly are superstars, but you remain a very small minority. As we continue to explore applying custom styling in mobile, only styling from the core CSS files will be incorporated.