Comment 3 for bug 565189

I have a similar issue, found first in Mint 9 RC and confirmed upstream with Lucid (x64 in both cases). I'm trying to install on my laptop (single-drive). I have 50gigs un-partitioned, I choose the "use largest continuous free space" option to install. This suggests 2 new logical partitions, typically sda5 and sda6 (one ext4 for root and one swap). So far so good. I choose advanced at the end, looking to install grub on sda5 (I dual boot Win7 and try a lot of distros, so it's easier for me to let Windows have the MBR and manage from there with EasyBCD). This setup has worked fine on previous releases. Now however, I don't see any of the proposed new partitions in the dropdown, but there is a mysterious sda-1. Selecting this disables the OK button.