Comment 8 for bug 174669

I'd like to get logs for this. If you can still reproduce this problem, could you attach /var/log/syslog and /var/log/partman from the running installer to this bug? (You can extract them by going back to the installer main menu and selecting "Save debug logs".)

The installer most definitely *does* support extended partitions, so I'm afraid the forum post that suggested that was a little confused. However, it's possible that there's some other change that happened at the same time as that rearrangement that meant that libparted could deal with your partition table again. In that case, failing logs ought to have a record of the exact problem.