Comment 1 for bug 21958

I've tried this several times now and appears to only provide the eroneous
information if the installer fails to partition the drive(s) for any reason thus
returning the user to the manual partitioning screen. The error then appears
when the user chooses to accept the current setup or changes drives that do not
have a mount point in the "/media" directory. At first glance, each drive has a
mount point listed next to it, but in this case the information is not true and
there is no mount point created. May not be a bug, perhaps just more thorough
error-handling?