Yes, that sounds like it may well be critical. Please file a new bug on the partman-efi package with full logs (/var/log/installer/syslog, /var/log/installer/partman, /var/log/installer/debug), and we'll look into it.
Yes, that sounds like it may well be critical. Please file a new bug on the partman-efi package with full logs (/var/log/ installer/ syslog, /var/log/ installer/ partman, /var/log/ installer/ debug), and we'll look into it.