Mozilla/Firefox streaming content problems.
I'm using Debian unstable (latest upgrade from a couple weeks ago). I have the Mozilla, Mozilla Firefox, Galeon, and Epiphany browsers installed. Both Mozilla and Firefox have TabBrowserExtensions (just in case that's relevant), MozPlugger, and RealPlayer10 (and plugin) installed. They all work OK for ordinary web content. Epiphany and Galeon handle streaming content OK, but both Mozilla and Firefox have problems with streaming content. All the plugins show up and are "active" in the "About PlugIns" page. The error symptoms are variable. For example, in Mozilla going to Yahoo! movies, clicking on "Harry Potter and the Goblet of Fire", then on "Exclusive clip: "The Maze"" creates a pop-up window but instead of the video there is a message saying
No Matching Stream
The media you are trying to access does not have a stream that matches your default settings. You might try running the Media HelperTM again. Check that you have all required software installed to get the most out of your audio and video experience.
plus buttons for "Run Media Helper" and "Cancel". Clicking "Run Media Helper" gets me a list of players and connection speeds. Only RealPlayer is selectable (and is already selected) and the speed selection is correct too. I click them anyway just to be sure then click "Accept Settings". The result is the same error message again.
Firefox is similar except it initially shows a blank frame (i.e. no video). Clicking "Change Settings" underneath runs the so-called "Media Helper" which always shows all three player plugins (Windows Media, RealPlayer, and QuikckTime) as installed and "OK". However, none of them actually does anything (BTW WindowsMedia is always preselected regardless of my previous choice).
Similarly streaming sound does not work. Looking up a word in Meriam-Wedbster Online and clicking the little speaker to hear the pronunciation results in a pop-up but no sound. Again, both Galeon and Epiphany work fine.
Just for the record the Mozilla RealPlayer plugin files are symlinked as:
/usr/lib/mozilla/plugins/nphelix.so -> /usr/local/RealPlayer10/mozilla/nphelix.so*
/usr/lib/mozilla/components/nphelix.xpt -> /usr/local/RealPlayer10/mozilla/nphelix.xpt*
Similarly for Firefox. Also /usr/local/bin/realplay -> /usr/local/RealPlay10/realplay which is in my path. It seems like /etc/mozpluggerrc must be OK because Galeon and Epiphany work OK? I can post it though if that'd be useful.
Anyway, the question is: Has anybody seen this before and, if so, how does one fix it? Thanks in advance for any help.