In this screen snapshot, you can see that the colours are quite different. Though the material colours on the sphere have exactly the same parameters. Not only that, the colours of the themes on the left look different too. I never changed these colours.
It rather seems that there is something like a gamma difference between the two.
The blend on the left is based on a 2.49 file. The one on the right is a native 2.53 blend.
Thank you for that very helpful reply !
I wonder how many useless replies I see on this forum. If you don’t have the solution, just ignore my request.
If I used a 2.49 file, it was a way to achieve something that is still not implemented in 2.5, i.e. renaming markers.
Camon, give me a better one than that, there are in fact things 2.5x still does not do, but renaming markers it does. Step into the Timeline window. Choose a frame. Press M to add a marker to that frame. Go to the header of the Timeline window and in the Frame menu click over the name of the marker to make it editable and change its name.