Firefox plays them all. News clips play fine at Fox News. This problem seems to only occur in Yahoo and with the News Videos.

Error details are this:
Line 567
Char. 83
“I” is null or not an object
Code 0
Http://cosmos.bcst.yahoo.com/up/player/popup/?/rn=3906861&CL=4226934&ch=4226736&scr=news

i had the same problem as flash woud say it was installed , but it wasnt. firefox plays everything.
after much deliberating i come to the conclusion that ie7(vista!)WHICH IS INCORPORATED IN VISTA! is easily brakeable. stick to mozzila until ie8 comes out.
the only way to fix this is to re-install vista on your machine.

every time you try to ask adobe for help they deny any problem so save a lot of stress and stick with firefox.(if you download the ie add-on for firefox it will look just like ie7).