"The spam contains an animated GIF with four frames. One of the frames (which contains the actual spam message) remains visible for 17 seconds. The other three frames are displayed for 10ms or 40ms, and each of those contains a little random noise and the word BUY in random positions."
-- See in action at JGC, read more at Richi Blog
Earlier:
Study: Subliminal Advertising May Actually Work
ABC Rejects KFC Ad As Subliminal
Dream Machine and Subliminal Ads?
