So version 3.1, I'm still getting either garbled or no disc images, and still only 34 covers display. The difference now is that Endless Ocean which after redownloading the image for Mario Kart, was the only garbled image on 3.0, instead displays a no cover found on 3.1. I figure because it's close enough to the end of my list that's actually viewable that it runs out of memory and stops trying there.
But, it definitely is more stable now.
Edit: In fact, when I jumped to the left quickly so that other stuff didn't get loaded, Endless Ocean was displayed properly, so I think it seems like 3.1 fixed the issues with garbled images for covers, and now there's only the issue for discs.
And as a nitpick, is there any chance the folder for disc art can be changed from usb-loader\disks to usb-loader\discs? Since we're talking about DVDs and not a floppy disk or hard disk, the correct term is disc. But that's so minor a thing I almost didn't mention it.