Are you guilty?

Although I learned a TON from Mrs.Williams in junior high I still need that refresher sometimes regarding commas.  You know Schoolhouse Rock can go a long way in a girl's brain...like eighteen years or so!  I came across a FUNNY post regarding commas and some other grammatical issues that irritate me!  I personally love #3 about the "scissor's". HaHaHaHa!  If you care to know, go here.  Another one I love or should I say HATE, is the you're/your, their/there/they're issue.  Seriously I have seen cards published in magazines with the incorrect spelling of  "you're/your".  These are usually "YOUR INVITED" type cards.  Ahhhh!  I want to scream!