Note, that this upgrade introduce changes to account storage in block.tlb:
In particular StorageUsed and StorageInfo are changed from

storage_used$_ cells:(VarUInteger 7) bits:(VarUInteger 7) 
  public_cells:(VarUInteger 7) = StorageUsed;
storage_info$_ used:StorageUsed last_paid:uint32 due_payment:(Maybe Grams) = StorageInfo;

to

storage_used$_ cells:(VarUInteger 7) bits:(VarUInteger 7) = StorageUsed;
storage_extra_none$000 = StorageExtraInfo;
storage_extra_info$001 dict_hash:uint256 = StorageExtraInfo;
storage_info$_ used:StorageUsed storage_extra:StorageExtraInfo last_paid:uint32
              due_payment:(Maybe Grams) = StorageInfo;

Previously public_cells were always zero thus old data is parseable under new rules, however once storage_extra_info will be activated new data won't be parsed by old indexers and parsers. It is expected that new scheme will be activated in testnet in early May and in mainnet in June. Please be prepared.