Stray apostrophes (or apostrophe's as some would write). Grrrr.
For those who want/need to know:-
Apostrophes can be used to denote ownership (e.g. the dog's b*****ks = the b*****ks of the dog, the dogs' b*****ks = the b*****ks of the dogs) or to show where letters have been removed (aren't = are not).
So your local kebab house sells burgers, kebabs and pizzas, not burger's, kebab's and pizza's.
If in doubt, leave it out, it's less noticeable.
It's = it is
Its = ownership (that dog's licking its b*****ks again).
All got it? Good.
Next lesson will be pronunciation of the Welsh letters ch, dd, f, ff and ll :P
(without the use of the dog's b*****ks this time)