When playing HTML5 video, VideoObj.currentTime=N fails

Sample problem is at
http://132.236.21.62/collt/authoring/currentTime.htm
You will also see a description there, and here it is, too:
A base64-encoded webm video is embedded with the HTML5 VideoObj=document.createElement("video") command, with custom Play, Pause, and Rewind button. Play and Pause work fine. But after the video plays to the end, there is no way to play it again. The Rewind button uses the command VideoObj.currentTime=0.1. This works in FF 15 in Mac OSX as well as in Safari 5, Chrome 21 in Mac OS X and Safari 5, Chrome 21, and IE 9 in Windows. It fails with FF 15.0.1 in Windows. Happens every time. My Windows 7 is 64-bit.

I can confirm that this works in Firefox 14.0.1, but not in later versions including the current Nightly build (18.0 a1).
See:
*https://developer.mozilla.org/en-US/docs/Bug_writing_guidelines
*https://developer.mozilla.org/en-US/docs/Reducing_testcases
See also Product: Core and Component: Video/Audio
*https://bugzilla.mozilla.org/describecomponents.cgi?product=Core
*https://bugzilla.mozilla.org/buglist.cgi?product=Core&component=Video%2FAudio&resolution=---

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