I also posted this on the PS3 Forum....here's the response I got back....any feedback on how I may go about this?
This error indicates that a DLNA request from the PS3 to the media server timed-out, meaning that the request was not acknowledged or responded to in a reasonable amount of time. The problem has nothing to do with the PS3 directly, although a change to the DLNA client code in System 3.72 may be the catalyst of the problem. It is either an issue on the LinkStation, or in the network. Probably the LinkStation. The uPnP setting is irrelevant. The LinkStation is on the same network as the PS3, so the router isn't using NAT; and therefore isn't using uPnP. A common cause is a plug-in or other component on the media server crashing when it receives a request from the PS3. It will be hard to debug on an appliance like a Linkstation. Have you updated the Linkstation to the latest version of its operating system? If so, go into the LinkStation configuration and disable any plug-ins or options for media that you don't actually stream to the PS3; if it will let you do that. That's about all you can do, short of using a different media server.
GKP