Slush, I think there was a problem calculating block rewards for block 237396. I only got a reward of 0.00003098 and it should have been in the range of 0.004 or greater.. Here are my rewards and shares for the last 4 blocks:
# Block found at Duration Total shares Your shares Your BTC reward Block # Block value Validity
18153 2013-05-22 19:33:54 2:16:21 18220901 1570 0.00501036 237404 25.42343650 100 confirmations left
18152 2013-05-22 17:17:33 3:04:10 24434822 4918 0.00003098 237396 25.10420001 92 confirmations left
18151 2013-05-22 14:13:23 0:16:44 2234190 530 0.00618735 237373 25.20905000 69 confirmations left
18150 2013-05-22 13:56:39 1:26:03 11420206 1855 0.00462750 237371 25.29270000 67 confirmations left
my own calculations based on my shares vs total shares shows the reward should have been much greater for that block. Not sure what happened, can you take a look when you have a chance?
Well your shares are looking off. It seems like you had a problem at the end of a block 18152 and start of a block 18153. For 18152 you should have about 6360 shares and for 18153 you should have 4770. So it is clear what happened. You stop mining or you had connection problems. You do know how scoring system works right? If not look back it is explained(last time) from page 429 on. If you have additional questions let me know.
EDIT: End of page 429