When selecting multiple items for copying, LT 2010 will deselect those that move off screen when panning across for more selections.

Also described here

Now I’m pretty sure this never happened in the earlier release at my old place (’04), but since that line of work didn’t require this amount of panning then I’m not entirely sure it hasn’t always existed.

Anyone know of a setting to turn it off, or have I got to just live with it?!