I don't know what to tell you.. It is printed in plain sight for everyone to read... The anti pool hoping algorithm that slush uses works agains you and every pool member ... There are other pools that do not penelize people for network drops and such, you just have to find them... look at block chain.net and then do some research ... I think in the end you'll be happy ..
I'd agree, this doesn't seem to be a case of the reward being off for everyone like it is often. It looks like you lost connection.
# your share %
21732 .111%
21731 .109%
21730 .109%
21729 .0785%
21728 .093%
21727 .105%
Are you sure you didn't have a rig down for maintenance or a miner that switched to a backup pool?