In this snapshot, CRC32 functions were totaly replaced by Hash32 functions, derived from Hash Functions for Hash Table Lookup by Robert J. Jenkins Jr. Apparently, Hash32 is faster that CRC32 and have a bit less number of collisions on Russian, English and French ispell dictionaries.
Due to this change, some collisions in clones detection are possible when upgrade from previous versions of DataparkSearch till full reindexing of all data with new algorithms.