Board Thread:Wiki management/@comment-20211881-20151030050251/@comment-188432-20151103200631

Yeah, the basic deal is that most of your infobox images were square, so there didn't appear to be much of a need to accommodate true widescreen images. As a result, widescreen images broke the bounds of the infobox.

But, as Cavia has pointed out, switching to img.pi-image-thumbnail {max-width:100%} fixes the problem pretty easily. You should be able to use images of any width in the infobox, now.