I have reproduced this failure with the 20131015 iso. This is an online installation, not an offline one.
I have attached the ubuntu-bug output to dupe bug 1240226. >From UbiquityDebug.txt: "Could not understand timezone America/Montreal" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1239127 Title: 20131011.1 iso gets stuck at timezone selection screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1239127/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs