>Most misused? Not even close. The winner is the use of "it's" instead of "its" for the possessive e.g when talking about an object, its properties and methods. "It's" is simply a contraction, meaning "it is", or sometimes "it has".
>
>This error is seen so frequently, even in copy by large companies in big advertising campaigns that I think the language is changing. In a way, it's logical - Jack's, Jill's, it's, ...

I think improper use of "myself" rivals and (IMO) surpasses "it's" for misuse. It far surpasses misuse of "there/their/they're", "your/you're" and the truly moronic "him and I", although I'll grant the last is mostly in spoken, rather than written usage.

Questions on this should be sent to any registered member of the grammar police or myself.

.......Rich