The reason I ask, is that if I have a DLNA client, be it a console like a PS3 or Xbox360 or even Twonkys own MediaManager, it doesn't make sense for the device to spend time and storage to create/save these thumbnails. On console's this is limited anyway, so I thought it made sense to store that on the DLNA server and be served to the client as part of the name, etc.
As it is, it certainly appears like the client does the hard work and it takes AGES (I am talking current hardware, gigabit network using a Buffalo Terastation Pro 2 as the Twonky server (v5.0.46), or have I got something mis-configured, which leaves it up to the client.
Thanks,
Alby