Loaded 4.10 last night and went for a 60km ride today - it was a crap shoo (that means it was doggy poopoo). Good thing i was riding alone - otherwise it'll be embarrassing - why? cause i spent so much on a piece of junk. I noticed 530's Time to Destination data was doubled - my speed was not slower than 20km/hr.....distance to destination was approx 17km....yet it informs me it's gonna take me 2 hours and 6 minutes to arrive. I stopped and played checked my settings - in the end I think it was the OSM maps. v4.10 does not play well with OSM maps. I had 2 versions of OSM maps - the lite version and the routable normal one - and both had the same issue. Tthe TBT screen would get stuck, it will continually go from one navigation arrow to another navigation arrow,........on and on without ceasing - so i abandoned the OSM maps and went back to the Garmin cycle maps. Lucky that worked all right. Pro Tip - make sure u enable DEM world wide map also. Leaving it disbaled will mess with the garmin.
So don't use OSM maps with V4.10. I tried again later with different settings and again found the same issues - TBT screen would get stuck with OSM maps.