Originally posted by McoreD@Sep 21 2002, 10:16 AM
for sure u may have installed early versions of WMP9beta!
that causes this message.
try the official beta in M$ 
Thanks, you are right it is only after I installed the newly leaked Windows Media Player 9 build 9.00.00.2848 that the "only for testing purposes" message showed on my desktop.
Also of note is the fact that the message did not display with the official Microsoft beta of Windows Media Player 9. It is only after I upgraded to the non official leaked beta build that the message showed up.