This is not a big problem, but here it goes: I emerged net-misc/ntp-4.2.0.20040617-r3 and I run ntp-client on default runlevel (and not ntpd). For this reason, /var/log/ntp.log was never created. Since I enabled the 'logrotate' USE flag, I receive error messages such as that: error: stat of /var/log/ntp.log failed: No such file or directory This is cause because /etc/logrotate.d/ntp is present. I don't know if it's easy (or at all possible) to solve this..
Don't use logrotate use flag for stuff where nothing will be ever rotated.
I think this is linked or due to either bug #53313 or bug #139654 I also encontour this bug. I need a fix. as long as ntp is emerged, and put at start with rc.update, there is no reason for /var/log/ntp.log not to be created, unless some default conf does not match reality !