A former student of mine, now in the wilds of Oregon, sent me this:
I cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdanieg The phaonmneal pweor of the hmuan mnid Aoccdrnig to rsceearh taem at Cmabirgde Uinervtisy, it deosn’t mttaer in waht oredr te ltteers in a wrod are, the olny iprmoatnt tihng is taht the frist and lsat lteter 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 ltteer by istlef, but the wrod as a wlohe. Such a cdonitoin is arppoitaely cllaed Typoglycemia.
Amzanig huh? Yaeh and yuo awlyas thhuogt slpeilng was ipmorant.