Rolf,
I also discovered the same problem yesterday and am getting the same error message: Not Enough Memory{ Error # ::0, in sound.cp@line 101} when trying to play Snood.
I'm also having a problem with my Eric's Ultimate Solitare X which just started yesterday also. So is another iMac user. See this thread:
http://discussions.apple.com/message.jspa?messageID=1892148#1892148
Both games had been working perfectly, without any problems for the last 3 months, every since getting my iMac in mid-January! Why would the program work perfectly fine for 3 months and then all of a sudden have a conflict?
It seems very strange that both games would stop working at the same time. Apple care seems to not care or want to help as evidenced by the response given to the other iMac owner that contacted them about the Eric's Solitare problem.