After more testing now, it looks like the Topfield TRF-2400, TRF-2460 and TF7100HDPlus are having issues downloading the device list from the server, we are still investigating this issue to try and find out why this is the case.
It also looks like on these specific models are affected, the older TF7100HDPVRt is not affected and works fine, along with all other PVR's.
We will update as soon as we have additional info.