Reverend,
I checked the Options tab, and "download codecs automatically" is selected on. The video clips in question aren't Divx or anything special, though I have those codecs installed.
I get the following error box text "Windows Media Player encountered an unknown error. This can occur when another program or operating system component encounters a problem but does not communicate the nature of the problem to the Player." (Error ID = 0xC00D11CD, Condition ID = 0x00000000)
I don't know if that helps.
Thanks for your time...
Blackdog