Comment 42 for bug 576724

Part of the problem is windows refers to drives when they really are partitions. In windows you have a C: drive and a D: drive when you only have one hard drive and two partitions. All those windows users that then have not installed Ubuntu other than the auto installer really do not know about partitions. So when the grub installer says to install to all drives the average windows user thinks that has to include everything. Then list list presented does not clearly list drives separate from partitions. If you have a lot of partitions it becomes a very long list.
The average user see this and will check off everything because they were told to install to all drives;
[ ] /dev/sda 640135MB,WDC_WD6400AAKS-00A7B0)
[ ] - /dev/sda1 (13209 MB)
[ ] - /dev/sda10 (41948 MB)
[ ] - /dev/sda11 (10988 MB)
[ ] - /dev/sda12 (48002 MB)
[ ] - /dev/sda3 (429877 MB)
[ ] - /dev/sda4 (0 MB)
[ ] - /dev/sda5 (13152 MB)
[ ] - /dev/sda6 (11531 MB)
[ ] - /dev/sda7 (10001 MB)
[ ] - /dev/sda8 (50420 MB)
[ ] - /dev/sda9 (10997 MB)
[ ] /dev/sdb (160041 MB, ST3160811AS)
[ ] - /dev/sdb1 (75039MB)
[ ] - /dev/sdb2 (55002MB)
[ ] - /dev/sdb3 (10997 MB)
[ ] - /dev/sdb4 (19000 MB)