Mouse triple click selects view line. It should select logical line instead. There is also a line selection mode command (Ctrl-P). It also selects view lines. I think users want to work with logical lines most of the time.
Minor glitch: if the text has no terminating newline, selecting last characters also selects end-of-file mark. Not a bug, just looks strange.
This minor glitch should be fixed on beta 17. I will add the mouse triple click behavior option to our wish list. Thanks!