I think I have to withdraw this bug report, but please read on. In fact, the installation process *has destroyed* my /home partition, but I'm not sure any more whether the bug has been in the installer or on my hard drive.
The installer informed me about a tiny extra partition of some 8 MBs. I have no idea where this partition suddenly came from. After trying the install process (which aborted with an error message I don't remember any more), I tried to boot my old 6.10 Xubuntu. I got an error message saying "bad superblock on /dev/hda7". fsck refused to work. My /home was lost. I started gparted to examine the partitions and discovered the tiny extra partition /dev/hda6. As I said, I have no idea where this suddenly came from. As far as I remember, my /home was my old /dev/hda6 and I never had a /dev/hda7. gparted said that it could not detect the file system type of /dev/hda7, so my /home was lost. I used gparted to merge /dev/hda6 and /dev/hda7 into a new parition... and now the installation process proceded without any problems. None of the bugs reported above appeared again. I am writing this now on my freshly installed Feisty Fawn. -- Preparing partition step in installer fails https://launchpad.net/bugs/88930 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs