Comment 11 for bug 943713

This issue was fixed in Upstream clamtk 4.38.

Here is the information from CHANGES file.
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4.38 - Mar 22 2012
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 * New icon for use (Launchpad #637940).
   Thanks, Skyler!
 * Fix for crontab (Launchpad #943713). Thanks, Nobuto!
   Note that you may have to delete and re-add
   your scheduled scan if this problem affected you.
 * Improvement for scanning from commandline
   (Debian #659968, Launchpad #937084). Thanks, Michael!
 * Improve program name in AboutDialog.
 * Updated Uyghur (ug) language file. Thanks, Sahran!
 * Updated Hebrew (he) language file. Thanks, Yaron!
 * Updated Chinese traditional (zh_TW) language file. Thanks, Pin-hsien Li!
 * Updated French (fr) language file. Thanks, Nicolas!
 * Updated English (en_GB) language file. Thanks, Vibhav!
 * Updated Galician (gl) language file. Thanks, Marcos Lans
 - Ciberirmandade!
 * Updated Asturian (ast) language file. Thanks, Xuacu!
 * Updated Spanish (es) language file. Thanks, Fitoschido!
 * Updated Russian (ru) language file. Thanks, Oleg!
 * Updated Italian (it) language file. Thanks, Valter!
 * Updated Malay (ms) language file. Thanks, abuyop!
 * Updated German (de) language file. Thanks, Daniel!
 * Updated Korean (ko) language file. Thanks, MinSik!
 * Updated Ukrainian (uk) language file. Thanks, Yuri!
 * Updated Czech (cs) language file. Thanks, Martin, Martin, and Zbyněk!
 * Updated Polish (pl) language file. Thanks, Łukasz!
 * Updated Greek (el_GR) language file. Thanks, Sterios, and George!
 * Updated Dutch (nl) language file. Thanks, Rob!
 * Updated Slovak (sk_SK) language file. Thanks, Tomáš!
 * Updated Basque (eu) language file. Thanks, Asier!
 * Updated Bulgarian (bg) language file. Thanks, Damian!
 * Updated Finnish (fi) language file. Thanks, Jiri!
 * Updated Bosnian (bs) language file. Thanks, Kenan!