People really annoy me when their putting there homophone's & apostrophe's over they're in the wrong place. But its OK if your doing it deliberately to tease you're readers!

Banjo Johnny, I had a protracted discussion with someone about preventative/ preventive once (my middle name is pedant). The consise OED listed only "preventive", but the three-volume edition in the local library also listed "preventative" as a rare but acceptable variant.

Ebbie,
Thanks,............I hoped someone would spot that, my boss used to use it all the time.

ALSO "It costs between five to ten pounds"
NO!
"It costs between five and ten pounds"
OR
"It costs from five to ten pounds"