[Truth29]

Well, although not a grammar issue, one of my pet peeves is the constant misuse and confusion between "lose" (the opposite of find) and "loose" (the opposite of tight).

[kitkat]

Ohhh, how could I forget the one sentence that most annoys me. It always goes something like this:

"He was one of the only....."

The only what?
The only how many?

And I've seen this used by writers who should know better.