On a line with just spaces, Ctrl-Backspace works as it should, deleting back up to the end of the previous line.
However, Ctrl-Shift-Backspace does nothing. It should delete to the beginning of line. This is standard functionality in pretty much every editor I've ever used. (and is a Windows/PC standard) -- <http://forum.pspad.com/read.php?2,56650,56650> PSPad freeware editor http://www.pspad.com
