Paul,
 
PQ> Yes, you are correct for the majority of its usage.  Look, I am not an
PQ> expert but its misuse is one of those things that grates on the nerves
PQ> like dragging a fistful of fingernails across a chalkboard.  In the case
PQ> of 'it', which may be a unique case or may represent a class of
PQ> exceptions - I don't know, through its specialness makes it easy to
PQ> remember.
 
You are flirting with "the first Law of Dossche".
 
 \%/@rd

--- D'Bridge 3.99 SR25