Looks like my system is not the only one where adding high heel shoes or boots to a prompt can result in multi-limbed mutations. This just happened on Clipdrop using SDXL, which normally is better than regular Stable Diffusion at get things right.

Also noticed some sort of attempt at a watermark or logo which is probably only there because the AI thinks that's a normal part of a picture. Unfortunately, it also generated a signature, the clearest one I've seen yet on another render, and I'm not sure what to make of that. 

A case of "AI see, AI do" or copycatting? When I fed it back into a clip interrogator the text description it threw back at me was: a painting of a man sitting on a couch, a fine art painting, by Charlie Bowater, sherlock holmes, flamboyant clothes

I looked up this Charlie Bowater person, that is not her signature nor anything like it. No artists names were invoked in my prompt, only name mentioned was Sherlock's. Definitely not mistaking the character name for an artist's, as has been known to happen. So where did this looks-like-a-signature come from? Might be just a meaningless artifact, a glitch or a ghost in the machine as it were, but it's things like this that add some credence, justified or not, to what the anti-AI faction keep going on about.