[VE][76] Element X undefined is confused?

As you can see on the validation page, this page gets an error that says
"Element strike is undefined. Did you mean strike or strong?"
Which is completely weird. I mean look at it. I think the validator doesn't
read the tag right, because this sentence doesn't make any sense.
Validating http://scene.wosaic.net/article/20
Error [76]: "element X undefined"