Most of the details can be found in this discussion
http://flowplayer.org/forum/8/21736
But for a summary of the problem with a better subject, since Flowplayer 3.1.1, there seems to be a JavaScript/Flash timing problem that is mainly seen on IE browsers (especially 8) and fast computers with fast connections. The problem is that the Flowplayer loads without controls (and won't play if autoplay is on) and the page containing the player MUST be refreshed/reloaded for the player to work.
I have two examples:
1)
http://flowplayer.org/demos/plugins/streaming/first-frame.html
2)
http://coins.ha.com/c/video.zx?src=item&path=/4/8/5/3/4853837&SaleNo=1127&LotNo=1700
To reproduce this behavior, follow these steps:
1) Copy one of the above URLs
2) Close all IE instances
3) Open IE8 and make sure the home page(s) do not have any flowplayer calls
4) Paste the url in your browser. If the video is not playable, you have reproduced the bug. If it is, go through these steps again. It should be unplayable the second time.
If you cannot reproduce the bug, see the above-mentioned thread. it probably means your computer and/or connection is not fast enough.
It is believed that the Flash code must be adjusted to fix this (see the other thread).