I was going to write a rant about the misuse of "for all intents and purposes", but it seems that it's been done. Quite a few times actually.
Anyway, it's a peeve of mine. I'm not perfect, but it really bugs me when I hear people say "for all intensive purposes". Really. Think about what you're saying for a minute. What purposes are "intensive"?
Here's a list of other malapropisms.