Ezekiel 29:9-12 & 30:4-16 is a prophecy that Nebuchadrezzar (known elsewhere as Nebuchadnezzar) would destroy the land of Egypt, cause it's inhabitants to cease, make the land desolate & waste, that it would not be inhabited for 40 years, & that there would never again be a ruler in Egypt. The fact of history for all to see is that Nebuchadrezzar did not destroy Egypt. He did not make the land a desolate waste, it hasn't been uninhabited at any time in it's history, & to this day there is a ruler in Egypt (Hosni Mubarak currently). So history refutes this prophecy.
A prophecy that the bible itself refutes is Jeremiah's prophecy to king Jehoiakim (Jer. 36:30), where Jeremiah prophesies to Jehoiakim that he would have no sons to rule over Judah. However, his son Jechoniah (also Coniah & Jehoiachin) (1 Chron. 3:16 & 2 Kings 24:6) was the very next king of Judah (Esther 2:6 & 2 Kings 24:6-8).
Christians like to point to fulfilled bible prophecy as proof that the bible is inspired. However, here are two prophecies that failed, one refuted by history, & one refuted by the bible itself. I'm interested in seeing how christians will explain this away. Remember, the test of a prophet is that his prophecies must be fulfilled exactly as prophesied, 100 % of the time.