What annoys you

What annoys you the most to see in someones code?
What annoys you the msot in a programming language?
Mention all the programming related annoyances.

I don't see what's so good about K&R braces. I prefer this style, it's much clearer:

while(x<=>y)
{
    x /= y;
    y = modify(y);
    if (y<0)
    {
        x = x + y;
    }
}