Hi Oliver,
It appears FCPX 10.3 will no longer allow me to roundtrip a JPEG or PNG with Photoshop. I used to be able to reveal the image in the finder open it in Photoshop make a color change or adjustment to said file save/replace it and it would repopulate with the changes applied. Now I have to restart FCPX 10.3 for the changes to take effect. The obvious work around is to redo it in Photoshop and reimport. Or I have to import as a PSD file which is much heavier than a PNG and most times I don’t need to work with the image layers within FCPX. Just wondering if anyone has used this workflow and has had the same experience. Thank you!