Clamav/Freshclam update fails!

Problem: I got the following error message in the the freshclam.log file on several servers with clamav installed.

ERROR: getpatch: Can’t download daily-16682.cdiff from database.clamav.net

Due to this bug the virus database wasn’t updated for days!

It seams to be a bug in clamav with dialy-16682.cdiff (dialy.cvd increment)Normally that would be solve automatically by downloading daily.cvd (non-incremental), but this also fails with:

ERROR: Can’t download daily.cvd from database.clamav.net

Solution/Workaround: remove /var/lib/clamav/daily.cvd and rerun freshclam.