god this is such an annoying "feature". I have a stock VZW GNex, updated yesterday to 4.04 and things were great, until now that the phone won't stay off in my pocket. That big ole volume button easily gets pressed and then all of a sudden I'm butt dialing someone.
FYI, it's apparently only a problem if you don't have a screen lock or if it is set to slide. Any of the others, face, pattern, pin, etc won't wake the phone by pressing volume.
Looks like they just forced me to root a little sooner than I planned....oh well. I don't want my screen to have to have a lock on it and I don't want my volume button to turn on the phone.