Comment 1 for bug 757201

Formatting of fdisk output is pretty borked, is there a way to fix that?

In any case, here are the pre- and post-install partition tables when installing Ubuntu on my triple-boot system:

PRE GPT:
Number Start End Size File system Name Flags
        17.4kB 20.5kB 3072B Free Space
 1 20.5kB 210MB 210MB fat32 EFI System Partition boot
 2 210MB 160GB 160GB hfs+ Macintosh HD
        160GB 160GB 135MB Free Space
 3 160GB 320GB 160GB ntfs Windows
        320GB 320GB 335kB Free Space

PRE MBR
   Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0+ 25- 26- 204819+ ee GPT
/dev/sdb2 25+ 19481- 19457- 156282164 af HFS / HFS+
/dev/sdb3 * 19498+ 38913- 19416- 155952128 7 HPFS/NTFS
/dev/sdb4 0 - 0 0 0 Empty

POST GPT
Number Start End Size File system Name Flags
        17.4kB 20.5kB 3072B Free Space
 1 20.5kB 210MB 210MB fat32 EFI System Partition boot
 2 210MB 160GB 160GB hfs+ Macintosh HD
        160GB 160GB 135MB Free Space
 3 160GB 239GB 78.5GB ntfs Windows
        239GB 239GB 848kB Free Space
 4 239GB 239GB 1049kB bios_grub
 5 239GB 317GB 77.9GB ext4
 6 317GB 320GB 3352MB linux-swap(v1)
        320GB 320GB 335kB Free Space

POST MBR
   Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0+ 25- 26- 204819+ ee GPT
/dev/sdb2 * 25+ 19481- 19457- 156282164 af HFS / HFS+
/dev/sdb3 19498+ 29040- 9543- 76650692 7 HPFS/NTFS
/dev/sdb4 0+ 29040- 29041- 233271295+ ee GPT

Notice that sdb4 overlaps sdb1 in the post-install hybrid-MBR.