If you are having a problem downloading new WU's the last few days here is a quick fix. 

1. Shut down Boinc. 

2. Open the Boinc folder and find the "master_setiathome.berkeley.edu.xml" file.  

3. Right click and select EDIT.  You will see something like this in the file.  "<scheduler>http://setiboinc.ssl.berkeley.edu/sah_cgi/cgi</scheduler>" 

4. Copy this address less the quotes and paste it over the old address in the file. "<scheduler>http://128.32.18.173/sah_cgi/cgi</scheduler>" 

5. Save the file and restart Boinc. 

I had to do this to half my farm.  For some reason some uses the old address fine and the others won't.  Thanks goes to Pappa on the SETI forum for this fix.

Fred