Hey Humberto, the problem still there, can’t quite figure out why, but FCPX and even Motion5 do Transform scale in different way or using different algorithm than FCP7 and FCP7 result looks a lot better to me!
For example, in Apple ProRes4444 using Transform function to Scale from 100% to 103% over 10 seconds, I do this a lot in my screencast to create an illusion of movement in static images, export from FCPX you can see blurring straight away and it sort of changes every frame, export the same clip, all identical settings, from FCP7 I get some artefacts, but picture looks miles better and manages to maintain clarity and sharpness.
It might be than I’m not aware of some magic button in FCPX but as I said, I did experiment with Motion5 as well, changing export settings like turning off Motion Blur, Frame Blending, all sorts of things… but still the same, as soon as scale changes from 100% everything gets blurry. I’m not saying FCP7 Scale is perfect, I understand that perhaps technically it’s not possible to have sharpness when not in native resolution, but it’s so much better…
Unbelievable, but I constantly bump into issues when trying to complete a project in FCPX!