This is a serious bug of version since JW player 6.0 until recent latest version on Flash. Someone reported this bug since the version 6.0 launched but this bug never fixed by their support.
It's hard to explain how the behavior of the bug, please hit the play button and mouseover the timeline after the video played to see the behavior of thumbnail tooltip at here.
Any idea how to fix it?
First of all , we should let jwplayer's javascript to build the html code.
Initilaize jwplayer with js, and use HTML5 video in html like this:
Javascript:
This worked me in all browsers. jwplayer can conform if is HTML5 supported or not.
Or the below with forced HTML4 implementation:
And in setup you can set skin, controls, autostart anything you want:
http://www.longtailvideo.com/support/jw-player/28839/embedding-the-player/