Found this link courtesy of a forum I frequent, where many (well, some) of the members are very well educated people who from time to time lament the death of grammar. God that sounds fucking dull. Anyway, the theory is that it's all thanks to a) text messaging, and b) general idiocy amongst the needy, self-centred, drainpipe-jean-wearing, too-cool-for-school, ironic-t-shirt-wearing, lazy iKiddies aka the Gen Y segment of the population.
Someone on said forum posted this to help us deal with the errors we see without ranting about it constantly. Which is a bit late for me, but might help some of you.
Anyway, click here to enjoy.