Installer should strongly suggest testing integrity of cd before beginning installation
I tried to install Dapper Flight 5. When installing the base system some errors apperared related to checksum, and I couldn't complete the installation. As a result, I had formatted my linux partition and grub was broken, so I couldn't even use Windows.
I think the installation program should strongly suggest to test the integrity of the cd before doing anything else.
I had another issue when trying to install: i'm using a Dell laptop, and I've got a partition with something like 'Dell system rescue' that was already there when I bought the laptop. The installation told me that this partition was broken, as it was fat16 and clusters has 1 byte instead of 2 (or 2 instead of 1, don't remember!). Nothing was broken, but the message was alarming. I've read in the forums someone experiencing the same issue, also in a Dell laptop.
I hope it helps,