Comment 17 for bug 526581

Argh, I just had this rear it's ugly head with the i386 20100427.1 Live CD. I was performing an auto-resize install. Ubiquity version=2.2.23.

After "quitting" the install you can see what's mounted using "df":

Filesystem 1K-blocks Used Available Use% Mounted on
aufs 1026016 43192 982824 5% /
none 1021116 336 1020780 1% /dev
/dev/sr0 716212 716212 0 100% /cdrom
/dev/loop0 688000 688000 0 100% /rofs
none 1026016 100 1025916 1% /dev/shm
tmpfs 1026016 16 1026000 1% /tmp
none 1026016 100 1025916 1% /var/run
none 1026016 4 1026012 1% /var/lock
none 1026016 0 1026016 0% /lib/init/rw
/dev/sda1 6870624 4229440 2292176 65% /mnt/migrationassistant
/dev/sda12 6870624 4229440 2292176 65% /mnt/migrationassistant
/dev/sda13 6870624 4229440 2292176 65% /mnt/migrationassistant/home
/dev/sda14 6870624 4229440 2292176 65% /mnt/migrationassistant
/dev/sda16 6870624 4229440 2292176 65% /mnt/migrationassistant

If you're curious what those partitions are most are labeled:

ubuntu@ubuntu:~$ sudo blkid
/dev/sda1: UUID="F4C8C431C8C3F042" TYPE="ntfs"
/dev/sda10: LABEL="Documents" UUID="571cfad8-68c7-4703-883e-c0baa2a381d4" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda11: UUID="bf502251-6ccd-4b66-8f9a-458603a6d2f2" TYPE="swap"
/dev/sda12: LABEL="Squeeze Root" UUID="2d74adb5-1d41-46b0-b1ae-c0a2bf65cdcd" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda13: LABEL="Squeeze Home" UUID="732e374a-bfff-4b75-95ba-d35b4217df54" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda14: LABEL="Lenny Root" UUID="7810ffb6-28e9-42ce-af70-195f38155bbc" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda15: LABEL="Lenny Home" UUID="0ff06334-bf05-4f7d-8666-714f5d14187e" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda16: LABEL="K to L Root" UUID="0de9463a-cc69-4592-a369-dbae477d4228" TYPE="ext4"
/dev/sda17: LABEL="K to L Home" UUID="91757b88-dad6-461d-8074-3c28ccf72bad" TYPE="ext4"
/dev/sda2: LABEL="Lucid Root" UUID="fb0e61a6-d355-4687-9a98-da164a56cc60" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda3: LABEL="Karmic Root" UUID="b976dd82-1719-42e0-8a78-9e86e8ceba88" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda5: LABEL="Lucid Home" UUID="9397c183-6db2-4b47-b8d2-98234ce442d9" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda6: LABEL="Karmic Home" UUID="e7319a14-febc-4b42-ac32-9c0c2bbb53dc" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda7: LABEL="Backups" UUID="594c3d40-2791-4c0a-8644-d9812545da2d" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda8: LABEL="Pictures" UUID="8a3f6c83-cb52-4caf-96b8-5faf2c830453" SEC_TYPE="ext2" TYPE="ext3"
/dev/sda9: LABEL="Downloads" UUID="05289ee4-d681-4806-b6fd-aefd784f9323" SEC_TYPE="ext2" TYPE="ext3"
/dev/sdb1: UUID="16cb615e-a9cd-4f1b-a3ec-7e2f30c92659" TYPE="ext4"
/dev/sdb5: UUID="62332d1e-b642-4a4a-9754-9d16cd495142" TYPE="swap"
/dev/loop0: TYPE="squashfs"

I'll attempt to reproduce this again.