First of all, thanks so much for such a quick answer.
I tested the link you provide and it seems to work though with a slight frame jump in the first tween (heading).
I tried to do the same in my original project (this is, changing the placement of both jQuery and Tweenmax script tags to the bottom of the page just as you did). I was using VERSION: beta 1.9.4 and it didn't seem to work, but changing the script to VERSION: beta 1.10.1 definitely made the change...(I wonder why it did not help solve the issue when you tested the page).
I'll continue testing to make sure the results are not ramdomly buggy and I'll keep you all posted if I am able to get a pattern here.
Once again, thanks a lot!