We use a patched version of the 0.3.0-20061218 beta version of the deduplicator . The patch fixes the following issues in the NetarchiveSuite:

[attachment:deduplicator-0.3.0-20061218a.diff Patch against Deduplicator 0.3.0-20061218]

[attachment:Deduplicator-0.3.0-20061218-src.zip Patched sourcecode Deduplicator 0.3.0-20061218-src.zip]

Note that the deduplicator must be compiled with the same version of heritrix as the NetarchiveSuite uses, or the deduplicator will fail to work during runtime.