Help please, finding this JKR interview!!

[cubfanbudwoman]

No: HPFGUIDX 89937

Okay, now I feel like an idiot.  Earlier today I wrote this:

Siriusly Snapey Susan wrote:
Remembering JKR's infamous "I almost revealed it all in Chamber of
Secrets" comment [paraphrased], I think these ideas are worth further
contemplation.----------
-------------------------

Rightfully, someone wrote to me offlist to ask me where this quote 
came from...and I set off in search of it.  I've spent a couple of 
hours with no luck. I found this oft-quoted one--

They have such fun with their theories - and it is fun, it is fun. 
And some of them even get quite close. No-one has ever - I have gone 
and looked at some of it and no-one's ever... There is one thing 
that if anyone guessed I would be really annoyed as it is kind of 
the heart of it all. And it kind of explains everything and no-one's 
quite got there but a couple of people have skirted it. So you know, 
I would be pretty miffed after 13 or 14 years of writing the books 
if someone just came along and said I think this will happen in book 
seven. Because it is too late, I couldn't divert now, everything has 
been building up to it, and I've laid all my clues. 
http://news.bbc.co.uk/1/hi/entertainment/arts/3004456.stm

--and this--

Kloves will suggest cutting something from the script and Rowling 
will throw up a caution flag like, "No, something happens in Book 
Six that you'll need that to be in (Movie Two)."
"I've given Steve more than I've ever told anyone else," confides 
Rowling, wondering if that disclosure will open his life to fresh 
kidnapping and extortion threats. As for Kloves, he hasn't been in 
an odder situation: "I'm writing a story to which I do not know the 
end!" He pauses, then adds with the hint of a smile, "That sometimes 
happens in my own work – but here, I'm writing this over a decade."
Kloves and Rowling disclose, with appropriately cryptic flair, that 
a key scene in "The Chamber of Secrets" foreshadows emotional 
complications among three characters that will become apparent when 
the newest book is issued in June.
http://twnonline.org/archive_twn/030417/030417_dvd_select.htm

--but not the one I THOUGHT I remembered, wherein JKR said that she 
came close to revealing it all in CoS.  So is this a phantom in my 
imagination?  Did I make it up???  Help!!

Siriusly Snapey Susan