Flints and different editions

[alhewison]

No: HPFGUIDX 40387

In response to the recent thread re "descendant/ ancestor"  p245 UK 
CoS. I have a paperback edition that was bought c. Jan 1999. The only 
wording is "First Published in Great Britain in 1998". I take this to 
mean that although it is a reprint it is the same "edition" as the 
original hardback published the previous July and therefore the 
wording is unchanged. In my copy Dumbledore says "descendant".

I'm getting confused about flints and word changes in general, as 
I've found a few inconsistencies in the books, which as mine are all 
early editions, I have no idea if they've ever been corrected:

(I am sad enough to have 2 copies of both PS and GoF but I've lent 
out the later editions of these, so I can't check them!)

E.g.

PoA when Harry & co come out of the tunnel after the shrieking shack 
scene, the order of who comes out of the tunnel is changed when Harry 
and Hermione re-witness the scene when using the time-turner:

1st time:
"Sirius saw Snape up through the hole, then stood back for Harry and 
Hermione to pass. At last, all of them were out" p278 PoA UK hardback 
edition.

2nd time:
..."Then came Hermione
then the unconscious Snape, drifting weirdly 
upwards. Next came Harry and Black" p298.

GoF
When Harry wakes up with his scar hurting, we know its Saturday as he 
gets the invitation from the Weasleys to be picked up on the Sunday, 
but answers the invite "See you five o'clock tomorrow" p38.GoF UK 
Hardback edition. However, on p 133 when he tells Ron & Hermione 
about his scar he says on "Sunday morning, I woke up with my scar 
hurting again". 

I know that neither of these "Flints" are important to the overall 
understanding of the books, but I do wonder if there is a list 
anywhere of errors – and their corrections. I have looked on the 
Lexicon, and read the HPFGU essay on inconsistencies, but that 
obviously doesn't list every error. I know the First Edition of GoF 
is full of inconsistencies, some of which have definitely been 
altered, but as things change between editions we surely cannot know 
what "canon" actually is, and when certain  "flints" are errors or 
perhaps well disguised clues.

Ali