Meanwhile did some very quick testing.
Seems that there is something wrong with the possibility to
save (not using notepad-method, but from within BS.Player's "old-style" playlist)
correct playlist-files in txt format (seems OK in "internal" format), though
loading txt format playlist-files seems to be OK.
Have to run now (late already).
(PS: The error when just opening old-style playlist already previously reported!)