John wrote:

Looking at the BOINC-SETI server status I see the work units stack
waiting to send is now down to 7. The server status update is timed at
8th August, 2005, at 11.30 UTC.

The assimilators are now working again, so it should sort itself out 
eventually. I started a thread on this:

http://setiweb.ssl.berkeley.edu/forum_thread.php?id=18228

Brian