Strange error on upload: something to do with embedded colour profiles in JPEG perhaps?

<b>Error: Sample couldn't be created: Unsupported color conversion request</b>

So far I've only seen this for http://thornwolf.deviantart.com/art/Raina-speed-paint-133155593 and on a slightly differently-coloured version of it I have kicking around. Loads fine in Firefox and in my image viewer, but an e621 import dies with the above error.