A couple of observations I've not seen made yet

[GulPlum <plumeski@yahoo.com>]

Is Wood a prefect? In both movies, he wears a red prefect-like badge 
througout. In PS/SS, it's most visible towards the end of the scene 
where he's introduced to Harry by McGonagall, and again just before 
the team take off for the match. In CoS, it's even more visible, 
especially during the confrontation with Flint before the Mudblood 
line.

I thought it might just be a Quidditch captain badge, but during 
PS/SS, Flint's not wearing one (but he is in CoS). Whilst it would 
sense for the captain to be identified during matches, the badge is 
also part of Wood's standard uniform.

A small touch I liked: notice that a (better) copy of the book Ginny 
has in her cauldron in Flourish & Blotts ("A Beginner's Guide To 
Transfiguration", according to the book) is on McGonagall's desk 
during the Transfiguration lesson... :-)

Ron's really letting himself go - throughout CoS, his school tie is 
*permanently* either crooked or not done up properly. The only 
exception to this is during Transfiguration lesson. In contrast, 
during PS/SS except for his shirt hanging out after the exams, his 
appearance is exemplary... :-)

Talking of Ron, both in PS/SS (Christmas scene) and CoS (Aragog 
scene) he's wearing jumper with zip-up fronts. Where did wizards find 
out about zip fasteners? :-) 

And talking of clothing technology, both in PS/SS and CoS, the 
Hogwarts regulation shoes are all rubber-soled (we see the soles of 
Harry's, Ron's and Malfoy's shoes one one occasion or another). I'd 
think leather soles much more in keeping with thw wizarding world.
(I've been meaning to make that comment ever since PS/SS) :-)