DaVinci 11 Delivering Overexposed Clips

For some reason my rendered, exported clips are coming out brighter (at least a full stop overexposed) out of DaVinci Resolve. They look perfect in the color and delivery pages before render, it's the same monitor and Mac Pro, yet the images are overexposed and contrast is low. Ideas?

Which color space? What file types are you using? How is the monitor calibrated?

I always drop in 5 seconds of bars and 5 seconds of 10-step grayscale at the very head of the file just so I can pull the delivered file back into Resolve and see what's happening on the scope. If it's the same as the original on the scope, then it's fine. If the test signals change, you have a real problem.

Gamma Shifts can and do occur under some conditions, and there are also Video vs. Data Level issues (covered in the manual). If you're dealing with Video and delivering Video, keep it all in Video (or Auto).

Redlogfilm R3D. Do you have a recommendation for calibration software for Mac? I used to use Eyeone when i was shooting a lot of photography but haven't calibrated my new Mac monitor.

Redlogfilm R3D. Do you have a recommendation for calibration software for Mac?

The Light Illusion people have a pretty good system, and the X-Rite i1 is pretty widely used as an affordable probe:

http://www.lightillusion.com/specials.html

Use test signals and render to a predictable file format like ProRes or DNxHD and it should "theoretically" work when you bring the rendered file back into Resolve. I find 444 codecs produce less of a gamma shift than others, but uncompressed DPX is pretty rock-solid, too (albeit huge).