Re: emacs 24 - mouse drag does not highlight

> In 24, if I down-mouse-1 and start to drag to select a region, the 
> region is not highlighted until I release the mouse.  In 23, it 
> highlighted as I dragged, what I consider normal for both 
> Windows and Linux.

It works for me.

Try providing a reproducible recipe, starting with `emacs -Q'.

Use `M-x report-emacs-bug' to report it as a problem, if you think the problem
is not on your end.

My guess would be that it is a platform problem.  But if you are on MS Windows,
with nothing else special going on, it should just work, out of the box.