Board Thread:Support Requests - Getting Technical/@comment-27794543-20161105075834/@comment-24473195-20161105141652

Yes, it isn't, but if you look at the file page the wiki's image rescalers create alternate resolutions for it, and one of the resolutions created is 320 x 199  and 640 x 399. While for both lucifer and conviction it creates a  minimum of 320 x 213.

Those are resolutions it prepares in advance for both users to download, and also for various devices. Anyway, I guess you've found a minimum resolution which basically resolves this thread.