Installation crashes

[Alan Stables]

Installing Myth TV

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: Fri Apr 18 19:36:08 2014
InstallCmdLine: file=/cdrom/preseed/mythbuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Mythbuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Apr 18 18:35:48 mythbuntu /plugininstall.py: Traceback (most recent call last):
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1770, in <module>
Apr 18 18:35:48 mythbuntu /plugininstall.py: install.run()
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 78, in wrapper
Apr 18 18:35:48 mythbuntu /plugininstall.py: func(self)
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 204, in run
Apr 18 18:35:48 mythbuntu /plugininstall.py: self.configure_plugins()
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 570, in configure_plugins
Apr 18 18:35:48 mythbuntu /plugininstall.py: self.run_plugin(plugin)
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 544, in run_plugin
Apr 18 18:35:48 mythbuntu /plugininstall.py: ret = inst.install(self.target, PluginProgress(self.db))
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/lib/ubiquity/plugins/myth-install-type.py", line 198, in install
Apr 18 18:35:48 mythbuntu /plugininstall.py: self.setup_roles()
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/lib/ubiquity/plugins/myth-install-type.py", line 178, in setup_roles
Apr 18 18:35:48 mythbuntu /plugininstall.py: vnc.create_password(passwd)
Apr 18 18:35:48 mythbuntu /plugininstall.py: File "/usr/lib/python3/dist-packages/mythbuntu_common/vnc.py", line 58, in create_password
Apr 18 18:35:48 mythbuntu /plugininstall.py: raise ValueError('Password should be passed as bytes')
Apr 18 18:35:48 mythbuntu /plugininstall.py: ValueError: Password should be passed as bytes
Apr 18 18:35:48 mythbuntu /plugininstall.py: