I have shot some footage on a Sony F3 at 1080p25, captured with a Gemini 4:4:4 as 1080p25 4:4:4 DPX frames. So far so good.
Long story short I ended up with choosing Adobe Media Encoder for transcoding to ProRes4444, since Compressor and FCP required GlueTools etc. and it seems that Adobe Media Encoder do a great job....but:
If I import my DPX sequence to After Effects or Premiere Pro it interpret correctly to 25fps, and if I send it to Adobe Media Encoder from Premiere Pro it says 25fps, but I would like to go directly to Adobe Media Encoder with my DPX sequences - but that way it reads the source as 29.97fps!
I can't find anywhere to alter the source framerate so Adobe Media Encoder will see it as 25fps....any suggestions what this all about?
It may be too late for you, but I ran into the same problem and found a solution:
1) Add your DPX sequence(s) to the queue.
2) Select all sequences by Apple-clicking on the clip names one at a time.
2) Right-click on one clip name in the queue and select the "Interpret Footage..." option.
3) Select "Assume this Frame Rate" and type in the source framerate of your DPX footage.