Photomatix Pro user question

For those of you who have been working with this program for a while, I downloaded v3.1 yesterday, but I'm noticing something that I'm not sure about. I go to the "Tone Curve" segment of the procedure, where I can make all my adjustments and get it looking just right. Then I click on "Process Image" and the resulting image is noticeably darker than what I thought I had just the way I wanted prior to processing the image. What gives?

It has to do with the settings you choose in the tonemapping process. There's a question related to this on the Photomatix site in their FAQ. Go to their support page, http://www.hdrsoft.com/support/index.html and check out Error Messages and Unexpected Results. I've experienced the same thing. It results from trying to push the envelope too far in the Light Smoothing, if I recall.

Thanks Robert, that's just what I was looking for.