Maatkit shows the MySQL replication error in one table, but won't fix it
I think a chunk is a set number of rows to be scanned and checksummed.

I never did like chunks because if the table order matters, each chunk could be completely different if just one row was written ahead or behind another.

Try not setting a chunk size and see if the entire table is checksummed as a whole as a opposed to each chunk checksum.

You can also run mk-table-sync using the --print option and redirect to a text file to see if there is any SQL created that would have been executed to sync the slave had you used the --execute option. If nothing comes out into the text file from mk-table-sync, you will have to resort to doing physical copying (for MyISAM) or mysqldump the table and loading it on the slave (for InnoDB).

Give it a Try !!!