A different kind of puzzle today!
What's the optical illusion demonstrated by this image? I'm not looking for a technical name, just a description of what you can see in this image that isn't true.
Oh — I don't mean the moiré effect in the small thumbnail.
[Edit]Added another version of the illusion, where I've removed the anti-aliasing. The results in moiré effects, but you may (try) to ignore these.
Answers in
as usual please!
(I found this illusion at the excellent blog by Richard Wiseman)