>>>I count, without really spending much time on it, a minimum of 10 grammar errors in this very short comment. I'd love to see this person's resume cover letter.
>>>
>
>Is it 10 grammar errors or 10 grammatical errors?

Good question. six of one; half dozen of the other, afaic. On the other hand, why grammatical instead of grammatic? Is it necessary to add 'al' in order to convert an adjective into an adjective? ;)