I've experienced that the Pardus developers do the updates in bulks every couple of weeks.
With the result that Pardus security updates tend to lag behind. A few recent examples:
tcpdump vulnerability
CVE-2007-1218
Ubuntu: 2007-03-06
Pardus: 2007-03-16
- - - -
thunderbird: Multiple vulnerabilities
CVE-2007-0775, CVE-2007-0776, CVE-2007-0777 etc.
Ubuntu: 2007-03-07
Pardus: 2007-03-16
- - - -
gnupg: Signed message forgery
CVE-2007-1263
Ubuntu: 2007-03-08
Pardus: 2007-03-16
- - - -
file: Integer overflow vulnerability
CVE-2007-1536
Ubuntu 2007-03-21
Pardus 2007-04-03
- - - -
firefox: Vulnerability in handling FTP responses
CVE-2007-1562
Ubuntu 2007-03-27
Pardus 2007-04-03
- - - -
inkscape: Multiple format string vulnerabilities
CVE-2007-1463, CVE-2007-1464
Ubuntu 2007-03-21
Pardus 2007-04-03
- - - -
nas: Multiple vulnerabilities
CVE-2007-1543, CVE-2007-1544, CVE-2007-1545, CVE-2007-1546, CVE-2007-1547
Ubuntu 2007-03-28
Pardus 2007-04-03
- - - -
kdelibs: port scanning via ftp protocol
CVE-2007-1564
Ubuntu 2007-03-29
Pardus 2007-04-03