My two bits worth, I believe the freezing is not because of setting on the Mag units but rather the server itself, some time it works flawless, other times it freezes like crazy (without any changes on my Mag254), it may be possible to reduce the freezing somewhat by setting the buffers or changing the network settings but most of it has to do with the bandwidth at the server side, settings and traffic. After all it is in testing mode so the providers are probably tuning and testing equipment to see the effects.