I didn't notice it! I usually listen to the live version she did in 2002 and I prefer it because it's faster and more agressive.
By the way, that might be that I never noticed it because I always listen to "Harmonium" in a low volume, for me it seems that it's meant to be listened to in secrecy. LOL Just a crazy thing of mine. But, well, how do you guys listen to Vanessa? Apparently, you must turn the volume up for you've heard this detail!