I have heard a similar story from another user in #pardus - he said his partitions can be seen and accessed by windows but not during the Pardus installation. Not sure, what the prob was.
how about to make a "fdisk - l" and see if the partitions show up there
e.g. either before you start the Yali or e.g. start the live cd and do it from there
let's see if it is a yali bug or something else
Yes, I can see the partitions when I do fdisk -l in a konsole window. I've tried another distribution as well (latest alpha of Kubuntu) and it cannot see the partitions either. I also found a page on RedHat's site that mentioned a possible bug in libata ...