I can't remember the exact place I saw this (but I believe it was on another StackExchange site), but when someone was commenting on a software's "spell check" function, they said something to the effect of:

> 
> A spell check is something I do with my local coven, a spelling check is what I do when I'm 
>  reviewing a written document.
> 
> 
> 

Is it more correct to say:

> 
> This paper is horrible! You didn't even use a spelling check.
> 
> 
> 

as opposed to 

> 
> You didn't even use a spell check.
> 
> 
> 

?