Jockey does not suggest binary NVIDIA driver on MacBookAir3,1

[PrivateUser132781]

My MBA contains an NVIDIA Geforce 320M GPU. By default, jockey does not suggest any proprietary display drivers. However, if I manually install nvidia-current or nvidia-current-updates, the binary Nvidia drivers do show up and can be activated in jockey-gtk.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: jockey-gtk 0.9.7-0ubuntu7
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Thu Jun 21 13:01:41 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64+mac (20120425.1)
MachineType: Apple Inc. MacBookAir3,1
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_ZA:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_ZA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-25-generic root=UUID=a364565a-46f7-44e1-a591-39b01f467926 ro quiet splash vt.handoff=7
SourcePackage: jockey
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/24/12
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA31.88Z.0061.B07.1201241641
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-942452F5819B1C1B
dmi.board.vendor: Apple Inc.
dmi.board.version: 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-942452F5819B1C1B
dmi.modalias: dmi:bvnAppleInc.:bvrMBA31.88Z.0061.B07.1201241641:bd01/24/12:svnAppleInc.:pnMacBookAir3,1:pvr1.0:rvnAppleInc.:rnMac-942452F5819B1C1B:rvr1.0:cvnAppleInc.:ct10:cvrMac-942452F5819B1C1B:
dmi.product.name: MacBookAir3,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.