Graphical installer doesn't continue installation if there are unmounted partitions

Also true in Ubuntu (not just Kubuntu.) I just had this problem on a computer with pre-existing partitions that I wanted to keep, but leave unmounted in Dapper 6.06. Booted from the Live CD, clicked on the Install icon and proceeded to go through the setup. Everything worked fine except I could not leave my CentOS partition blank - I was required to enter a mount point for it, even though I did not want it mounted in Ubuntu.

It's easy to fix later, just remove the line from /etc/fstab, but the installer should not behave this way.

Same result here using Shipit Ubuntu CDs.

The installer gives visual warning that a partition does not have a mount point. Installer then refuses to allow the user to proceed without entering a mount point for the partition.

This behaviour is not present in the old-style text-based installer.

Moving to Ubuntu ubiquity.

Did you try just opening the corresponding partition list and setting the partition to blank? That should definitely work with Ubuntu 6.06.1 - I'm not absolutely sure about 6.06 or Kubuntu.

This should get a lot easier once https://launchpad.net/distros/ubuntu/+spec/ubiquity-advanced-partitioner is implemented, anyway.

This is fixed by the new advanced partitioner in Feisty.