This one only works in Internet Explorer, although if you are a Firefox user like me there is one called Spellbound you can install, although I can't for some reason I can't quite understand, so I guess for now I'll have to carry on writing stuff in word and then copying it over.
I'm blessed with the other condition that Chavender mentioned, although I don't personally call it an abnormality. What you have to remember is that alphabet based scripts are a comparatively recent invention, dating back as I understand it, to about 5,000 BC, which is a blink of an eye really. My theory is that language developed to suit the non-dyslexic brain. If the majority of people were dyslexic, our written forms of communication would have developed differently and it would be the non-dyslexics that would be considered 'abnormal'.
Another interesting theory that I came across relates to Attention Deficit Hyperactivity Disorder, another member of the family of so called 'conditions' along with Dyslexia and Dyspraxia. This theory suggests that when mankind was living in a state of nature and hunting to survive, a capacity to switch from intense activity to disengagement may have put the subject at a competitive advantage. In other words perhaps a touch of ADHD or it's allied conditions, could help an angler, at least as far as more active styles like lure fishing or roving techniques are concerned.
The approach of the old style Secondary Modern teacher that Clive mentioned may have worked for the lazy scrote, for us lot though, it often did a lot of damage and could blight people for life.
I was lucky to find a teacher in my last year at secondary school who spotted it. It was too late to rescue my school career but at least I knew that I wasn't as thick as less enlightened teachers had been telling me for years.
Cheers
Bill