A lot of creationists have problems with radiocarbon dating. It's because with this, as with all other aspects of evolution and an ancient Earth, they have no clue what they are talking about. They should read this:
Radiometric Dating
This destroys two creationist myths in one fell swoop. It destroys the myth that evolution = atheism, since this article was written by a Christian, and it destroys the lie that radiocarbon dating is unreliable.
Radiocarbon dating is only unreliable when used by creationists to shore up the cracking, warped and faded false-front of their blind belief.
Budikka