well, i attach a small video, with the bug.
select a line (shift+down), copy to clipboard (ctrl+c), select another line for paste (shitf+down) and paste it (ctrl+v).
now i have 2 line hilite, press down and old hilite don't remove, go up, and disappears.
(http://i2.zvhost.com/2/m/mxr7c31f.jpg) (http://www.zippyvideos.com/6338977856737496/b3/)
Thanks denise_amiga
I will have a look at it.
KetilO