ClamAV update process started at Thu Jul 09 13:29:06 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
WARNING: getfile: daily-9463.cdiff not found on remote server (IP: 207.57.106.31)
WARNING: getpatch: Can't download daily-9463.cdiff from database.clamav.net
Trying host database.clamav.net (64.246.134.219)...
WARNING: getfile: daily-9463.cdiff not found on remote server (IP: 64.246.134.219)
WARNING: getpatch: Can't download daily-9463.cdiff from database.clamav.net
Trying host database.clamav.net (168.143.19.95)...
WARNING: getfile: daily-9463.cdiff not found on remote server (IP: 168.143.19.95)
WARNING: getpatch: Can't download daily-9463.cdiff from database.clamav.net
WARNING: Incremental update failed, trying to download daily.cvd
daily.cvd updated (version: 9551, sigs: 40761, f-level: 43, builder: ccordes)
Database updated (585796 signatures) from database.clamav.net (IP: 207.57.106.31)

These are the warnings when I load Clam Free Virus on my new Dell Inspiron 530 computer.
I am the only system administrator. How can I fix this?

It looks like the signature database was finally updated after some problems--see the last notice. This happens occasionally.

Regards,

it's ok, cdiff are incremental updates but mirror do not retain full history of incrementals, so if incremental files would be big than the db itself, the full db is downloaded