LIBOVERLAY_SCROLLBAR=0 should always work as it disables the overlayed scrollbars, if you still get crashes with LIBOVERLAY_SCROLLBAR=0 the problem is somewhere else (or you are having the problem described in comment 20)
LIBOVERLAY_ SCROLLBAR= 0 should always work as it disables the overlayed scrollbars, if you still get crashes with LIBOVERLAY_ SCROLLBAR= 0 the problem is somewhere else (or you are having the problem described in comment 20)