Thanks for the reply and suggestion... but no joy here...
Still back on FW 1.02, tried a factory reset, full shutdown, restart, same issue. The web interface and OLED display say UPnP is running, but nothing else on my network sees it (as it used to). If I try to put in a single drive just to eliminate anything in the file system, then put back my 4X500gig raid 5 setup, will the raid5 still be intact?