I have a training that was working fine in JAWS until I installed the latest update. Now tabbing to a button with a trigger attached to it immediately activates the trigger. So, for example, if you tab to a Next button, it will take you to the next page without the user pressing space or enter. It seems to work a lot better when published to Flash, but this seems like something that should be fixed in html5. I'm submitting a case to Articulate Support, but wanted to note it here as well in case anyone else is running into the same problem.