My two Arima's had computation errors on all WUs. I tried to get more WU but I got this:

Tue 14 Dec 2010 03:43:08 PM PST World Community Grid Message from server: No work sent
Tue 14 Dec 2010 03:43:08 PM PST World Community Grid Message from server: No work is available for Help Conquer Cancer
Tue 14 Dec 2010 03:43:08 PM PST World Community Grid Message from server: (reached daily quota of 16 results)

I hope they get new WU soon...