The onboard clock has to be managed by the kernel, so this would have to be addressed in a future version of the ROM. I don't believe you'll see a fix in 1.0.6, but it has already been brought up in another thread. We are all aware of it.
Another idea would be to port ntp to pdaxrom. That would allow the Z to sync to a network clock at regular intervals. I believe this is on the roadmap also.
The thread on 1.0.6, while it is getting quite long, might be a better place to inquire.