Not sure what is going on but it is an issue with mobile web.

it's probably a missing class in the template - this happens frequently.

oohh it's a video - so an issue with TimedMediaHandler. Needs to add a thumb class.

"Needs to add a thumb class."

Euh no. it's an inline inclusion, which != thumb.

This mostly seems to have to do with the idiocy that is Template:TFAVIDEO that is wrapping this video.... I have no idea what that is for, but I'm asking.

Thanks @TheDJ, sorry I wrote my answer a bit too fast. So the issue is with the template in that it uses a table (with inline style width:auto; float: left; clear: left; margin: 0.2em 2em 0em 0px; background:transparent;)

It's an abuse of a table from my perspective. Had a div been used with some standard class e.g. thumb the padding would just work.

I don't actually think there is a bug in mobile here and the issue lies with the editing community...

There's a negative margin hard-coded into the thumbnail div at https://en.wikipedia.org/wiki/Wikipedia:Today%27s_featured_article/June_8,_2015.

Looks like TheDJ is working on a new version of that template that doesn't use negative margins.

Thanks @TheDJ :-)