Harry (Daniel Radcliffe) is too 'not-skinny'

[windyroselane]

What interests me after seeing the movie a couple times is how Daniel 
changes from slightly baby fatty to extremely skinny (the lanky Harry 
running down the stairs in those PJs at Christmas caused me to wonder 
why no one was feeding him also). You can tell Daniel really started 
to sprout during the film and that the movie was NOT filmed in 
sequence. Once you notice how he changes from scene to scene and 
BACK again you notice it forever. Where Daniel is right now entering 
movie 2 is dead on.

See post-premiere BBC Jonathan Ross interview with Daniel at:

http://www.bbc.co.uk/films/harrypotter/