Thanks for adding image support! With that Skybox is almost my exclusive media content device.
However, the image support currently seems to treat images more or less like static videos with a set play time. That's fine for a slideshow, but it means it's not easy to either stop on a specific photo, or quickly move to the next previous one.
I'd suggest having the navigation work differently for photos, similar to in other media browsers, where next/back always goes to the next/previous photo, with a toggle for "slideshow" mode which will automatically advance after a set time.