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Following a new security vulnerability in the Network Time Protocol software package, Apple has provided a software update for Mountain Lion and newer versions of OS X. As usual, the older version...
apple.stackexchange.com
Apple's PPC NTP client had a massive security hole. It was fixed with Mountain Lion, which of course isn't available for PPC Macs.
The TL;DR is: disable PPC NTP services. If you want to run NTP, compile a new version. However, this could be somewhat problematic for 10.1.2, as it pre-dates XCode, so the build-from-scratch instructions won't work.
All slightly tangential to the question, but it's best not to run older versions of ntpd on any system, or at least not point them at a public NTP server.