i found this bug when i first installed 1.4.2 this did not happen the first time but for some reason minecraft stoped. restarted it it did work then went to my minecraft folder and deleted jinput.jar lwjgl_util.jar and lwjgl.jar and minecraft was force updated i did hit force update and minecraft ran...

after a few months i was playing minecraft i found coal ore and i found it upside down now this for many blocks