Alex,
If MC offered a 'include subfolders' option in the 'move files' selection, there would be no need to have moved your files first outside of MC. You could have just moved them from D:\Music to X:\ in one move, right. Yeah you would have had to share X:\ in Explorer, but that's no big deal. MC could have done everything you wanted in one shot. Faster, easier and the find/replace would not have been needed.
Therefore, find/replace could have the ability to move files removed and it could be used simply for mapping changes, which is what it looks like it is supposed to do.
I see that the way it is is useful now, but it just isn't documented that it moves files and doesn't let you opt out of having it move the files. In order to do what I need to do, I now have to go to explorer, move all of my files to a new folder to break the link in MC, then do find/replace, then go move the files back. When I could simply just find/replace and be done.
Hopefully this can get worked out so everyone can get what they want out of this functionality.
Again, at the very least, give us the option to say yes or no to ALL when MC is trying to move the files using find/replace, although I would WAY rather have the move function be the only way to move the files, as that's what it's designed to do, and no one will be surprised if 'move files' actually moves files.