v1300 - mandatory update
This is a mandatory update fixing an issue with Difficulty Retargeting and includes a hard fork at block 1705800.
This update also includes a fix to masternodes that requires users to delete the mncache.dat file from their datadirectory.
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if necessary users may use their current copy of the blockchain as a bootstrap to sync quickly to the fork block.
this process involves deleting and renaming files in your datadirectory so it is recommended to back up your wallet.dat (or entire folder) before progressing.
you will need to enter your datadirectory,
delete folders txleveldb and database
rename blk0001.dat to bootstrap.dat
start the new client, this process may take several hours to complete.
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possible issue running the ubuntu daemon
terminate called after throwing an instance of 'std::runtime_error'
what(): locale::facet::_S_create_c_locale name not valid
try entering
export LC_ALL=C