I don't know what happened here, but this one had a catastrophic failure for me:
Extroverted (E) 68% Introverted (I) 32%
Sensing (S) 61% Intuitive (N) 39%
Thinking (T) 50% Feeling (F) 50%
Perceiving (P) 66% Judging (J) 34%
Your type is: ESTP
While I'm sure I've loosened up a bit on the I, I'm more I than E still. And botching T vs. F that bad takes some serious doing - "thinking-ness" is just about the core of my identity, you can't call that a wash under any case. I grant it probably isn't 100% the way it used to be, but seriously, the real one I scored a perfect 100% T while trying to be as honest as possible! No way it moved *that far* in only a handful of years.
All of which I think goes to show that the entire field of them is very hit or miss as to what they'll actually manage to measure. Even, as greendragon2000 mentioned, the real one has some stability problems when you take it a few times. (I bet he is fairly central on all of them though - the extreme signatures like mine means I should always get T very strong and I somewhat. So just bill yourself as well balanced greendragon2000, that's why the tests can't figure you out.)
INTP is my correct answer, although P is very weak (call it an InT- ?)