Yes, it does happen with all browsers, confirmed. Do you want the error log post or what?
Basically, youtube videos and such don't work (specifically, the action bar at the bottom never appears so the video won't start) and so I slide the Pop Up bar from custom (to what I've changed) back to high, refresh the page, and slide it back. Videos usually then work for a day or until I close the page, and then it starts again.