I bought the kit from Jameco about 4 or 5 months ago. Finally got around to assembly last week. Its very cool, but mine loses about 1 hour every 4 hours.
Do you have a spare USB power supply, for example from an old cell phone? That's been the root cause in other cases I've heard this reported.
I do, and I will try and report back - thanks for the quick reply!
Vicatcu, you were spot on! Changed the power supply and it keeps perfect time! Thanks!