new lightbox feature: "Unable to load image."

[reagle]

I can embed the image, but get error when I click...?

<figure>
<img data-src="http://www.phdcomics.com/comics/archive/phd051013s.gif" data-preview-image="true"
alt="it’s in the syllabus" />
<figcaption aria-hidden="true">it’s in the syllabus</figcaption>
</figure>

[reagle]

The quoted value has to be empty value or a different image.