Comment 3 for bug 1501636

Jonathan, you are right, I haven't noticed this. It looks like <CTRL>+left arror key or <CTRL>+right arrow key also mark the text. Text selecting/marking should only be when Shift key is also pressed, so <CTRL>+<SHIFT>+arrow key should jump to next word and mark the text, but <CTRL>+arrow key should only jump to next word and not select it. This is bug. I am marking the bug as Confirmed, because Jonathan has also been able to reproduce.