Ubiquity crashes installing on raid.

All mechanical harddisks were removed prior to booting live no /dev/sda resides in the system.
ultimate@ultimate:~/Documents$ sudo fdisk -l

Disk /dev/sda: 90.0 GB, 90028302336 bytes
255 heads, 63 sectors/track, 10945 cylinders, total 175836528 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0004d51c

   Device Boot Start End Blocks Id System
/dev/sda1 256 347654399 173827072 83 Linux

Disk /dev/sdb: 90.0 GB, 90028302336 bytes
255 heads, 63 sectors/track, 10945 cylinders, total 175836528 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/mapper/pdc_cgibjdebaa: 178.0 GB, 177999970304 bytes
255 heads, 63 sectors/track, 21640 cylinders, total 347656192 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Disk identifier: 0x0004d51c

                     Device Boot Start End Blocks Id System
/dev/mapper/pdc_cgibjdebaa1 256 347654399 173827072 83 Linux

Disk /dev/sdc: 4005 MB, 4005560320 bytes
124 heads, 62 sectors/track, 1017 cylinders, total 7823360 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000db091

   Device Boot Start End Blocks Id System
/dev/sdc1 * 62 7818695 3909317 c W95 FAT32 (LBA)

Disk /dev/mapper/pdc_cgibjdebaa1: 178.0 GB, 177998921728 bytes
255 heads, 63 sectors/track, 21640 cylinders, total 347654144 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 131072 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/pdc_cgibjdebaa1 doesn't contain a valid partition table
ultimate@ultimate:~/Documents$

Exception during installation:
Nov 14 12:47:49 ultimate plugininstall.py: Traceback (most recent call last):
Nov 14 12:47:49 ultimate plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1728, in <module>
Nov 14 12:47:49 ultimate plugininstall.py: install.run()
Nov 14 12:47:49 ultimate plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Nov 14 12:47:49 ultimate plugininstall.py: func(self)
Nov 14 12:47:49 ultimate plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 204, in run
Nov 14 12:47:49 ultimate plugininstall.py: self.configure_bootloader()
Nov 14 12:47:49 ultimate plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 999, in configure_bootloader
Nov 14 12:47:49 ultimate plugininstall.py: self.db.input('critical', bootdev)
Nov 14 12:47:49 ultimate plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 60, in <lambda>
Nov 14 12:47:49 ultimate plugininstall.py: lambda *args, **kw: self.command(command, *args, **kw))
Nov 14 12:47:49 ultimate plugininstall.py: File "/usr/lib/python2.7/dist-packages/debconf.py", line 81, in command
Nov 14 12:47:49 ultimate plugininstall.py: status = int(status)
Nov 14 12:47:49 ultimate plugininstall.py: ValueError: invalid literal for int() with base 10: ''
Nov 14 12:47:49 ultimate plugininstall.py:

Status changed to 'Confirmed' because the bug affects multiple users.

Intel i7 3770k cpu with Intel Sata/Raid controller
2x Western Digital Black Caviar 1 TB
2x Stripe + 1x Mirroring configuration

Ubiquity on Ubuntu 12.04, 12.04.1, 12.10 and 13.04 beta (4 february 2013 daily) still doesn't work.

From the terminal I get:

ubuntu@ubuntu:~$ ls /dev/sd*
/dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sde1

ubuntu@ubuntu:~$ ls /dev/mapper
control isw_cdjeigjbcc_SeaStripe3 isw_cjcihhebae_WdStripe1
isw_cdjeigjbcc_SeaStripe isw_cjcihhebae_WdBack isw_cjcihhebae_WdStripe2
isw_cdjeigjbcc_SeaStripe1 isw_cjcihhebae_WdBack1
isw_cdjeigjbcc_SeaStripe2 isw_cjcihhebae_WdStripe

Confirmed for 12.04 and 13.04 again..

However a manual installation with the right /dev/ instead of sda as argument to grub-install worked for me!

Confirmed on Ubuntu 13.04 beta 2 :(

Jakob, more instructions?
Thanks

Ok, we are recently tracking development to fix this on bug 1167366. I will mark this one as duplicate of that one.

@xnox
I can't select anything, Ubuntu freeze before I can select any partitions, and I use normal ubiquity (manual?) installation.