For some (including me) shares/reward for round 21007 still show 'none'. I have seen recalculations/fixes in the past before the block is confirmed, but currently there are only 11 confirmations left...
21007 2013-12-01 00:37:37 7:48:38 2147483647 none none 272385 25.20690867 11 confirmations left
This is the block where the total number of shared might have overflowed a 32bit integer - this is only speculation, but the total of shares is shown as exactly 231-1.
After my post on this issue last night and sending a PM within this forum, I was patiently waiting for this to get fixed, but now I have also sent a mail to pool operators and hope they will take action.
Regards,
T