Thanks Michael,
it is not much of a problem once you get used to it. I think it is a matter of convention as you mention.
I am just finding myself migrating sometimes between CAD and moi, and in these instances, I sometimes forget to deselect objects, and only find out that I moved it along with the new selection.
But it would not be a priority imo.

On another note, is there a way to cycle through the objects that are under the cursor, if there are several superposed objects?
thanks,