Just a warning to everyone eager to try out the new Microsoft codec--apparently, Microsoft has decided that it will offer no easy way for early adopters to "uninstall" the new beta version of the Windows Media 9 codec if it is installed on an ME or XP system. The only way to get rid of it is to do a "System Restore" to an earlier state. Users of W98 and 2000 can uninstall the usual way, by using the "Add/Remove" control panel applet. Since a beta version of software is often buggy (that's why it's beta software, after all) and since beta versions usually have to be wiped out before installing the official version, this is probably going to make for a few interesting situations over the next few months.
There's more info here:
http://zdnet.com.com/2100-1104-957704.html
There's more info here:
http://zdnet.com.com/2100-1104-957704.html