The ones that find my goat and get right on it are:
your - you're - "If your going home" If my what is going home?
their - they're - "If their going home"
its - it's (as you say) - "It's policies were very good" It is policies? Uh?
And while they're easy to figure out in isolation, they also make things unnecessarily hard to read... The apostrophe serves a very important purpose in highlighting where letters are missing, or where the possessive is used. In the words of A.E. Housman; "Accuracy is a duty, not a virtue"*.
I like these from Stephen Fry's autobiography:
1. A sentence with "and" in it five times in a row:
A signwriter, John, is training his apprentice, Martin, on how to do a pub sign for the Dog and Duck. Martin is having a go, and seems to be doing fine, until John says:
"You need a bigger space between Dog and And and And and Duck".
Brilliant.
2. A sentence with 7 prepositions in a row:
A small boy is awaiting a bedtime story from his mum. She enters the room, bringing a book about Australia. He says:
"Mum, what did you bring a book to read about down under out of up for?"
I love our utterly ridiculous language!!
Oh, and thanks for pointing out the error, W. Pooh. It was very late on a friday!
Yours,
Caring Sharing Pompous Git Bristol Billy Bob. :wink:
* - http://www.guardian.co.uk/g2/story/0,,1353559,00.html