if you can give me your payout address and the blocks you have found I can check this in the blockchain.
Wallet: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX. Blocks 35112 and 35117. I did not find the blocks myself.
You can check directly from the recent blocks found now on
http://dutchpool.org:27100 , I have just linked the blockexplorer mentioned in the message before yours

I don't know at what time you started mining at the pool, but it seems that your miner did not solve enough shares yet at the moment those blocks were found because it is not in the blockhash, p2pool uses a PPLNS payout system which is based on the amount of work put in over a longer period of time, usually several hours, in order to discourage poolhoppers. The NLG pool was moved somewhere between yesterday evening and now to a new faster server ( as stated on
http://dutchpool.org ), so I think by now everything should be fine.
EDIT: I just noticed you mentioned 15 NLG, one more thing that is important to understand, p2pool or any pool for that matter will try to predict the future, it will show you statistics based on recent blocks and payouts, that is by no means a guarantee for the future, networkhashrate can jump from 100 to 1000 mh/s in 1 minute and the predictions will be wayyyyyyyyy off then, I hope that makes sense
