"Immaculate Conception" DOES NOT EQUAL "virgin birth."
The doctrine of the Immaculate Conception refers to the conception of Mary, not of Jesus.
(This rage brought to you by the
Star Tribune headline linked to by
thistlerose.)
[I am so not Catholic and actually hate the doctrine of the
Immaculate Conception -- and am moderately indifferent to the doctrine of the Virgin Birth -- but this is totally one of those errors that makes me twitchy.]