This is not new but Berkeley has never given a good answer for it!
I too have it in several units.

On Sat, 16 Oct 2004 00:01:04 GMT, "Christopher Battles"
<c.battles@nowhere.net> wrote:

Sorry if this has been gone over already, but I was perusing my completed
results data and noticed alot of 0.00's on granted credit for WU's that had
succesfully completed.  It seems that if a single computer returns a bogus
result that everyone gets the shaft.  A bug in the validator SW?  As you can
see below, 3 computers, one being mine, returned succesful results and the
one wiht the unknown outcome appears to have forced a zero credit for
everyone else.  I've been seeing this regularly once I began looking for it.
Doesn't seem right to me....

Summary of workunit
     application SETI@home
     created 28 Jul 2004 15:41:30 UTC
     name 08au03ab.28481.9330.686074.78
     granted credit 0.00


Results: Result ID
     click for details Host Sent Received Server state
     explain  Outcome
     explain  Client state
     explain  CPU time (sec) claimed credit granted credit
     4179099 80746 6 Aug 2004 9:24:44 UTC 9 Aug 2004 16:03:31 UTC Over
Unknown New 0.00 0.00 0.00
     4179100 80278 6 Aug 2004 9:24:45 UTC --- Over No reply New
0.00 --- --- 
     4179101 56853 6 Aug 2004 9:24:46 UTC 11 Aug 2004 6:33:01 UTC Over
Success Done 11,566.61 41.45 0.00
     4744841 18911 11 Aug 2004 17:22:16 UTC --- Over No reply New
0.00 --- --- 
     7196211 158895 9 Sep 2004 6:46:28 UTC 13 Sep 2004 20:51:37 UTC Over
Success Done 14,341.35 44.78 0.00
     7196212 84328 9 Sep 2004 6:46:11 UTC --- Over No reply New
0.00 --- --- 
     9856321 215477 26 Sep 2004 14:00:14 UTC --- Over No reply New
0.00 --- --- 
     11947490 69656 13 Oct 2004 0:07:53 UTC 15 Oct 2004 23:52:32 UTC Over
Success Done 62,792.06 61.14 0.00