Issue:
- Dec 8 2009: 'ERROR: Can't verify database integrity' occurred between two command-line request within the same minute

Log of command line requests:
09-12-08 14:56:12 0006: Executing "C:\Program Files\ClamWin\bin\clamscan.exe" C:\windows\Temp\$TE4ztyd --no-summary -d "c:\Documents and Settings\All Users\.clamwin\db"
09-12-08 14:56:12 0008: clamscan.exe returned no error
09-12-08 14:56:12 0008: Executing "C:\Program Files\ClamWin\bin\clamscan.exe" C:\windows\Temp\$TE4ztz5 --no-summary -d "c:\Documents and Settings\All Users\.clamwin\db"
09-12-08 14:56:14 0006: clamscan.exe returned error level 50
09-12-08 14:56:14 0006: Virus: Scanner reported virus infection for flag_300.jpg

Workaround:
- rename main.cvd to main.cvd.bak
- issue a new update command (downloading a full database)
- the corrupted main.cvd can be supplied

Feature request:
- try to fix what is causing the database integrity check
- auto/self heal the database on integrity errors
- try to do this from within the command-line scan request (delay scanning operation untill healing is complete)
- when this is not possible, make such a check database integrity and healing available as a scheduled task
- and preferrable allow smaller units than once every hour (I would love 15 minutes as interval)

ClamUpdateLog.txt:
--------------------------------------
ClamAV update process started at Mon Dec 07 19:00:00 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
daily.cld is up to date (version: 10117, sigs: 118129, f-level: 44, builder: guitar)
--------------------------------------
ClamAV update process started at Tue Dec 08 15:41:23 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
Downloading daily-10118.cdiff [100%]
Downloading daily-10119.cdiff [100%]
Downloading daily-10120.cdiff [100%]
Downloading daily-10121.cdiff [100%]
Downloading daily-10122.cdiff [100%]
Downloading daily-10123.cdiff [100%]
daily.cld updated (version: 10123, sigs: 120445, f-level: 44, builder: ccordes)
Database updated (665480 signatures) from database.clamav.net (IP: 62.26.160.3)
--------------------------------------
ClamAV update process started at Wed Dec 09 10:10:10 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
Downloading daily-10124.cdiff [100%]
Downloading daily-10125.cdiff [100%]
Downloading daily-10126.cdiff [100%]
Downloading daily-10127.cdiff [100%]
Downloading daily-10128.cdiff [100%]
Downloading daily-10129.cdiff [100%]
Downloading daily-10130.cdiff [100%]
Downloading daily-10131.cdiff [100%]
Downloading daily-10132.cdiff [100%]
Downloading daily-10133.cdiff [100%]
Downloading daily-10134.cdiff [100%]
Downloading daily-10135.cdiff [100%]
Downloading daily-10136.cdiff [100%]
Downloading daily-10137.cdiff [100%]
Downloading daily-10138.cdiff [100%]
daily.cld updated (version: 10138, sigs: 122662, f-level: 44, builder: ccordes)
Database updated (667697 signatures) from database.clamav.net (IP: 62.26.160.3)
--------------------------------------
ClamAV update process started at Wed Dec 09 10:40:47 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
daily.cld is up to date (version: 10138, sigs: 122662, f-level: 44, builder: ccordes)
--------------------------------------
ClamAV update process started at Wed Dec 09 11:00:54 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
daily.cld is up to date (version: 10138, sigs: 122662, f-level: 44, builder: ccordes)
--------------------------------------
ClamAV update process started at Thu Dec 10 01:37:19 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
Downloading daily-10139.cdiff [100%]
Downloading daily-10140.cdiff [100%]
Downloading daily-10141.cdiff [100%]
Downloading daily-10142.cdiff [100%]
daily.cld updated (version: 10142, sigs: 122685, f-level: 44, builder: arnaud)
Database updated (667720 signatures) from database.clamav.net (IP: 62.26.160.3)
--------------------------------------
ClamAV update process started at Thu Dec 10 01:41:48 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
daily.cld is up to date (version: 10142, sigs: 122685, f-level: 44, builder: arnaud)
--------------------------------------
ClamAV update process started at Thu Dec 10 01:46:10 2009
Downloading main.cvd [100%]
main.cvd updated (version: 51, sigs: 545035, f-level: 42, builder: sven)
daily.cld is up to date (version: 10142, sigs: 122685, f-level: 44, builder: arnaud)
Database updated (667720 signatures) from database.clamav.net (IP: 130.59.10.36)
--------------------------------------
ClamAV update process started at Thu Dec 10 10:55:33 2009
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
Downloading daily-10143.cdiff [100%]
daily.cld updated (version: 10143, sigs: 122685, f-level: 44, builder: guitar)
Database updated (667720 signatures) from database.clamav.net (IP: 62.26.160.3)


Environment:
- Windows XP SP3 EN
- Previously McAfee Virusscan 8.0i was installed, but uninstalled
- ClamWin was installed quite fresh: Nov 25 2009
- ClamAV is configured to do its updates once a day, at 19:00
- Known viruses: 658474
- Engine version: 0.95.3

rather than renaming is better to wipe at all db directory contents