Same problem just started for me this week. Only a black screen in the video frame. Running Mac OSX Lion, just upgraded from Snow Leopard and also upgraded to Firefox 5.01. Flash is current and videos play at other sites I visit. Using my Web Developer Tools add on, there is an error message: Error: DM_addEncToLoc is not defined Source File: http://video.foxnews.com/v/1101262314001/model-injured-on-mexican-tv-dance-show Line: 996 When viewing source code, I am able to copy and paste the address link of the SWF video file and that plays in Firefox. I am only having this problem at FoxNews.com and so far no other site. Other Add Ons are disabled. Video plays fine in Safari.