Please describe what you're doing in more detail. Are you using the text-based installer or the live CD graphical installer? What changes did you make in the partitioner? Exactly what happens (or doesn't happen)? Can you attach log files (/var/log/syslog, /var/log/partman) to this bug?
Please describe what you're doing in more detail. Are you using the text-based installer or the live CD graphical installer? What changes did you make in the partitioner? Exactly what happens (or doesn't happen)? Can you attach log files (/var/log/syslog, /var/log/partman) to this bug?