\C-v is normally one page down by default. I have no setting that overwrites it (at least not that I know of).
During the operation of Emacs, this particular keybinding is overwritten by 'yank'.
I have no idea what has caused it.
* *Messages* 4614 Fundamental
hw_unit1.py 2194 Python ~/Dropbox/OnlineCourses/Robot/hw_unit1.py
*% :home 6661 twittering-mode
*% :replies 2448 twittering-mode
* *ansi-term* 151 Term (*ansi-term* run)
*% soujiro0725/news 2793 twittering-mode
*% soujiro0725/agr... 1582 twittering-mode
* *init log* 4526 Fundamental
*scratch* 191 Lisp Interaction
*auto-install h... 0 Fundamental
* *ESS* 188 Fundamental
* *anything recentf* 116 Anything
* *Growl* 534 Fundamental
* *anything compl... 593 Anything
* *anything* 112 Anything
Thanks in advance.