
Running Firefox 2 on XP SP2 (Firefox/2.0.0.12 to be precise)
No problems with IE6
edit: not sure if related, but if I disable JavaScript in FF, I get a series of Illegal Operation in Plug In error messages relating to WMPlayer DLL Plugin.
( , Sat 8 Mar 2008, 18:04, Reply)

I totally can't reproduce this on either Vista or XP. Still trying...
EDIT: 100% clean XP SP2. Firefox 2.0.0.12. Absolutely nothing else (no patches, media player updates, or plugins). Works fine. sigh
( , Sat 8 Mar 2008, 18:32, Reply)

from port25.technet.com/pages/windows-media-player-firefox-plugin-download.aspx
and now I get the player controls in FF and can view video with no problems
Presumably I was just using the default FF plugin before, or one that was bundled with wmplayer.
( , Sat 8 Mar 2008, 18:42, Reply)

when you weren't getting controls, were you still getting the video? or just the audio?
( , Sat 8 Mar 2008, 18:54, Reply)

just as a black square, right size for the video, but no controls and no video or audio. Seems some people have had the video playing automatically, but I didn't experience that
( , Sat 8 Mar 2008, 18:59, Reply)