Dansguardian files rewrite

[samham]

I have a problem with group configuration based on ip auth, every time I make a change to dansguardian the content of the "ipgroups" file is wiped out. is this a bug?

file in question "/usr/pbi/dansguardian-amd64/etc/dansguardian/lists/authplugins/ipgroups"

Dansguardian 2.12.0.3 pkg v.0.1.7_3
2.1-BETA1 (amd64)  built on Sat Feb 23 11:00:21 EST 2013