Here's a picture of the little door that shuts over the keyhole... mine went whacky too...

There's a whole bunch of different things you could do about it, ranging from "nothing"
to buying a whole new lock-set from HDL for $125 or so. I did "nothing" for a while, which
works great, but every now and then the little door floating around in there made it hard
to get the key in... I really wanted to be able to get my key in, so I replaced the lock-set.
Replacing all the locks is not only a big pain in the rear end, but massive overkill.
Some folks reported (when I talked about it here) that they had gotten good local locksmiths to
fix it for them. My good local locksmith said she could take it apart and take the broken bits
out, and put it back together, but that she couldn't fix the little door. Perhaps, if I had bought
just a new ignition switch (cheaper than the whole lock set) she could have used the door parts from
the new ignition switch and the "key parts" from the old switch and
I still would have only one key... didn't want to have one key for the ignition and another key for the
other locks...
-Mike