In the Slush's pool statistics page, there is a table titled
"Bitcoin block history", this is from the column "Block value"

You can see the block in question here:
http://blockchain.info/block/0000000000000003d9da3be4b9a972c5626aec46d5398f455611067a38842826?site=slush

This appears to be the 25BTC "Block reward" plus 0.18185416 BTC "Transaction fees"