debian-installer creates swap smaller than RAM size (GPT)

Expected: swap partition to be around 4GB (corresponding to RAM)
Actual: swap partition is around 2.2 GB

I used the "Guided - Entire disk" install option, which for the ubiquity installer creates the swap as the same size as the RAM. Cannot tell yet if this may be GPT-specific, but I will test some other ISOs ...

This is ubuntu-oneiric-alternate-amd64+mac.iso from 2011-09-20

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: debian-installer (not installed)
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Thu Sep 22 10:01:41 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64+mac (20110920.5)
MachineType: Apple Inc. MacBookPro6,2
MemoryUsage:
 total used free shared buffers cached
 Mem: 3915564 1342328 2573236 0 69692 672224
 -/+ buffers/cache: 600412 3315152
 Swap: 2188364 0 2188364
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=7cd5c162-cc9a-4382-a741-9dcad4686185 ro quiet splash vt.handoff=7
SourcePackage: debian-installer
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/26/10
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP61.88Z.0057.B0C.1007261552
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F22586C8
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro6,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F22586C8
dmi.modalias: dmi:bvnAppleInc.:bvrMBP61.88Z.0057.B0C.1007261552:bd07/26/10:svnAppleInc.:pnMacBookPro6,2:pvr1.0:rvnAppleInc.:rnMac-F22586C8:rvrMacBookPro6,2:cvnAppleInc.:ct10:cvrMac-F22586C8:
dmi.product.name: MacBookPro6,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.