The main problem is the mouse pointer issue. Pointer (arrow) is allways at correct position, but other pointer icons is after a while on wrong positions. Happens more frequently with trackpad than with external mouse.
The issue seems to be related to the upscaled graphics due too the huge resolution, maybe some relations to the touch screen also.
My guess is because the mouse cursors/icons are on different positions from the active mouse hotspot, as if they are placed related to the distance of hotspot in the mouse icon.
That sounded wierd, so let me give you an example. If the icon/cursor is drag horizontal then the hotspot might be at position (32, 6) on a 64x12 big icon, then the mouse icon shows onthe left and slightly up. On another icon, lets say 64x64 size, where hotspot is at (32, 32) then the icons is the same amount (as the horizontal drag icon) left of the mouse actual position, lets say 2cm on screen, then it is 2cm up.
The strange thing is that this distance is getting further and further away from the actual mouse position, first a few mm, then there are about 2cm, then I have to reboot to be able to work again.
If this issue is solved then I have no other issues with the m3800. But this issue is irritating enough...