This pigz update to version 2.1.6 includes a security fix and several bug fixes:
* fix temporary file permission bug (bnc#803933, CVE-2013-0296)
* fix dictzip with #CPU == 1 (bnc#597756)
Security Issue reference:
* CVE-2013-0296
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0296>