since I'm a 'newbie', I wasn't able to post to the ufasoft-related thread . Sorry for that.
I'm trying to use it on Win7 64bit with Intel Core i5 520M. Starting the client throws the following error:
bitcoin-miner 0.19 Copyright (c) 2011 Ufasoft http://ufasoft.com/open/bitcoin
It runs flawlessly on a Win7 64bit machine with Core i5 2400.