It looks like this started back in 2003, but a few times a year I come across it and chuckle.
I cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdgnieg.The phaonmneal pweor of the hmuan mnid Aoccdrnig to rscheearch at Cmabrigde Uinervtisy, it deosn’t mttaer in waht oredr the ltteers in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat ltteer be in the rghit pclae. The rset can be a taotl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.
More on the meme at snopes.com
