It's as bad as the "Con-tin-ooo-ity" garbage. What the hell is a "Con-tin-ooo"? The term refers to a continuous series events (i.e. continuum); it should therefore be "Continue-ity".
There are several words that change pronunciation depending on prefix, suffix, or conjugation. Embarrassingly, I can't think of any examples, though there's one on the tip of my tongue.