Clock drift on an iBook2

Hi,
I have a new iBook2 and I'm having *severe* clock drift problems -- on
the order of several seconds gained per minute.  I'd like to get this
taken care of, and it seems to be a linux problem as OSX appears to
have a stable clock.

I'm running BenH's 2.4.7-pre6 right now, but I also saw it on 2.4.6.

Is this a known problem?  If not, what can I do to help get this fixed?
Ethan

-- 
If I've told you once, I've told you once
And once is all that you needed.
		-- The Refreshments, "Carefree"