I saw that the first batch of character infoboxes are being created - and that in some cases, the original .png render (with the transparent backgrounds) has been replaced with a .jpg version (with a white background).

Going forward, would it be best to stick with one format over another?

Personally, I would much prefer going back to the .png files, for those characters which have "clean" images in this format to use. Not only does the transparent background work better (in my view) with the board colour template, the images themselves may perhaps scale more cleanly. (Or at least so I was advised at another wiki where .png files are preferred.) Nerroth (talk) 17:59, September 13, 2015 (UTC)