System Settings -> Mouse & Touchpad -> Content sticks to fingers works with touchpad but not mousewheel

Turning on "Content sticks to fingers" works as intended with a touchpad but not a mousewheel. Mousewheel scrolling (at least with a Microsoft Intellimouse) is unaffected by turning on "Content sticks to fingers".

Expected behavior:

Turning on "Content sticks to fingers" should scroll the content of the page "up" when pushing the mousewheel "up" (away from your body).

Actual behavior:

Pushing the mousewheel "up" (away from your body) still scrolls the scrollbar handle up and the content of the page "down".

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-control-center 1:3.6.3-0ubuntu16
ProcVersionSignature: Ubuntu 3.8.0-13.23-generic 3.8.3
Uname: Linux 3.8.0-13-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.9.2-0ubuntu2
Architecture: amd64
Date: Sat Mar 23 17:10:35 2013
InstallationDate: Installed on 2013-03-23 (0 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64+mac (20130320)
MarkForUpload: True
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_gnome-control-center:
 activity-log-manager-control-center 0.9.4-0ubuntu6.1
 deja-dup 25.5-0ubuntu1
 gnome-control-center-signon 0.1.4-0ubuntu1
 gnome-control-center-unity 1.2daily13.02.15-0ubuntu1
 indicator-datetime 12.10.3daily13.03.07-0ubuntu1