When you get down into the details of Krishna, they do not mirror Jesus at all. Many times it appears to be a case of searching for patterns. Much of the comparisons come from a book by Murdock.
Jesus was prophesied a thousand years prior in the OT in Isaiah 7:14. Krishna was the 8th incarnation of Vishnu. Krishna's mother was Devaki and she was not a virgin. She had a total of 8 children. Krishna was the youngest of her children. So the virgin birth - Not true. Hinduism does not teach that the birth was even miraculous, as far as I can see.
Murdock claims that Krishna's father was a carpenter. That is also untrue. Devaki was a princess and married the nobleman Vasudeva. The claim is also made that the birth was attended by angles, wise men, and shepherds and that he was presented with gold, frankincense, and myrrh. Again this is completely made up. There is not a single reference to back it up. Reading the story of Krishna's birth shows that only his parents were present. Another claim is that a tyrant ordered the killing of thousands of infants because Krishna was a threat. Again, reading the story shows that only King Kasma only killed 6 of his sisters sons, because they were a threat.
There is also a claim that Krishna was killed on a crucifix between 2 theives. Another case of bad scholarship. Mahabharata 16:4 shows that Krishna was accidentally shot in the heel by a hunter who thought he was a deer.
What I keep seeing is people repeating the same claims over and over again without any proof. Either they repeat claims with no Hindu soruces or they repeat claims from other non scholars.
But people will believe what they want.
http://www.youtube.com/watch?v=KiARf13vltU