In include/parted/disk.h around line 158 is the definition for the block_sizes member of the _PedDisk structure: const int* block_sizes; /**< block sizes supported by this label */ This structure member is not used anywhere in libparted. I would suggest it be removed since having it there is a bit confusing.
I'll take this up with upstream :) thx for the report.
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle. Changing version to '11'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
I'll include this in new parted version for rawhide so I don't forget to post it to upstream. This will be available in the next version of parted parted-1.9.0