Mythbuntu 14.04 installer crashes when testing updated mythbuntu-common 0.74 with VNC ticked in installation options

[Regen]

This crash happened when testing updated mythbuntu-common package 0.74 from trusty-proposed as listed in bug 1290460.

This crash does not happen if VNC is not ticked in the installation options.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.7
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.340
Date: Sat May 17 15:58:58 2014
InstallCmdLine: file=/cdrom/preseed/mythbuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
LiveMediaBuild: Mythbuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 LANGUAGE=en_AU.UTF-8
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
May 17 07:58:53 mythbuntu /plugininstall.py: Traceback (most recent call last):
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1770, in <module>
May 17 07:58:53 mythbuntu /plugininstall.py: install.run()
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 78, in wrapper
May 17 07:58:53 mythbuntu /plugininstall.py: func(self)
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 204, in run
May 17 07:58:53 mythbuntu /plugininstall.py: self.configure_plugins()
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 570, in configure_plugins
May 17 07:58:53 mythbuntu /plugininstall.py: self.run_plugin(plugin)
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 544, in run_plugin
May 17 07:58:53 mythbuntu /plugininstall.py: ret = inst.install(self.target, PluginProgress(self.db))
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/lib/ubiquity/plugins/myth-install-type.py", line 198, in install
May 17 07:58:53 mythbuntu /plugininstall.py: self.setup_roles()
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/lib/ubiquity/plugins/myth-install-type.py", line 178, in setup_roles
May 17 07:58:53 mythbuntu /plugininstall.py: vnc.create_password(passwd)
May 17 07:58:53 mythbuntu /plugininstall.py: File "/usr/lib/python3/dist-packages/mythbuntu_common/vnc.py", line 59, in create_password
May 17 07:58:53 mythbuntu /plugininstall.py: raise ValueError('Password should be passed as bytes')
May 17 07:58:53 mythbuntu /plugininstall.py: ValueError: Password should be passed as bytes
May 17 07:58:53 mythbuntu /plugininstall.py:

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1290460, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.
[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]