Bind query logging stops after a logrotate.

[Charlie Schluting]

FBSD 5.1:
Using Bind9.2.2, and I have query logging turned on:

logging {
   channel "querylog" { file "/var/log/query.lo~g"; print-time yes; };
   category queries { querylog; };
};

After a logrotate, it stops logging completely. The permissions are
correct, and all I have to do to make it start logging again is: "rndc
reload".

Anyone heard of this? Any ideas?

TIA,

-Charlie