This turns out to be a different version of the test from any I've taken before. Once again, I got a different result. Two different results, actually -- I noticed that my T/F score was tied (50% each) so I clicked Reload as instructed to see the other interpretation.

First result:

Introverted (I) 56.25% Extroverted (E) 43.75%
Sensing (S) 54.05% Intuitive (N) 45.95%
Thinking (T) 50% Feeling (F) 50%
Perceiving (P) 60.53% Judging (J) 39.47%

Your type is: ISTP
Accuracy: [I gave it a 4]

ISTP - "Engineer". Values freedom of action and following interests and impulses. Independent, concise in speech, master of tools. 5.4% of total population.

I'm not a real engineer but the things I engineer don't seem to know the difference.

Second result for the same answers and scores:

Your type is: ISFP
Accuracy: [I gave it a 2]

ISFP - "Artist". Interested in the fine arts. Expression primarily through action or art form. The senses are keener than in other types. 8.8% of total population.

I can write, after a fashion, and photograph, but I can't draw, paint or sculpt for ****.

The result I got on a different test nine years ago, and still remember fondly, was INFP. The result I got on the test WePow linked to was INTJ. The only place I haven't been yet is E (which happens to be fine with me).