No, to give some users from the first (and only round so far) one last chance to get on the list and receive their stakes. They can do this by making sure their NXT addresses are secure. This only applies to 64 specific users who submitted and verified everything in time but didn't obtain a public key. These users were left out of the final list consisting of 889 valid entries. So far we got 825 secured addresses. 7 days from now (next Thursday), the last check and update will be made to the stakeholder list. Afterwards it's all set in stone; the list will never be updated again (though perhaps a new reg period will open in the future, with a whole new list).