In the source window hit Enter to start a new line and type an opening brace { VA X automatically inserts a new line and a closing brace } and places (and indents) the caret on the new line. Everything works fine until now as documented at http://www.wholetomato.com/products/features/insert.html
Now hit Backspace or Undo Previous builds (1418 at least) deleted the closing } However, 1442 deletes just the new line
Thus, to delete the inserted closing }, I have to - either use the mouse to select and then Delete - or hit Undo *3* times - or hit Backspace followed by at least 2 Delete's