getpass in IDLE gives "Warning: Password input may be echoed."

getpass.getpass() run in IDLE can't keep terminal input from being echoed:

>>> import getpass
>>> getpass.getpass()
Warning: Password input may be echoed.
Password: s3kret

's3kret'
>>>

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: python 2.7.3-0ubuntu2.2
ProcVersionSignature: Ubuntu 3.2.0-64.97-generic-pae 3.2.59
Uname: Linux 3.2.0-64-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Tue Jun 17 17:35:29 2014
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: python-defaults
UpgradeStatus: Upgraded to precise on 2012-11-17 (577 days ago)