"Uh, duh.  Ok, so just because you've updated flash on your computer doesn't mean that you're running the latest on each browser. Apparent..."

"Just to add some more info: I've tested other projects now and it doesn't seem to be the javascript. Other storyline projects having same..."

"Wow! Thank you! Yes, that worked for me too. (Just setting the timeline for the slide to 2 sec and a trigger to jump to next slide when t..."