Find Similar Fail?

When I checked to see if post #589405 had been uploaded yet, the Find Similar feature told me that it hadn't, even though I vaguely remembered seeing it on the site before. And when I tried to upload it, what do you know, it was already posted. Is this happening to any others here?
EDIT: Hmm, it seems to only happen with that one image.

Not working for me either, yeah.

You're better off contacting piespy either here or on IRC(#iqdb@irc.rizon.net) about problems with the image search thing.

Turns out that there were some 50 or so images in a row not added to the image DB for some reason. I've added them manually now.