[quote=Legend]
After the Lord gave the original ten commandments (Exodus 20), he also gave other commandments (Exodus 20:23-23:33). A similar thing happened here: there were other things that the Lord said to Moses, besides just writing the new tablets.The quite logical explanation is, then, that the Lord wrote the new tablets and gave them to Moses. Then the Lord spoke other words and told Moses to write them down. The content of the tablets is not recorded in Exodus for a second time, since the content was the same as originally.
[/quote]

Actually, there's a more "logical" and canonical explanation in christianity. Moses broke the first set, and so he went to god and asked for his commandments once again, and god gave him the second set. In all technicality, the first set which christians always boast about was never even in play.