You have a 10 MB Ethernet connection yes but what is your internet speed?
Sorry forget that, what I mean is you have a 10 Mb connection giving you a 1MB internet connection. In other words for you to have a 10MB connection to the internet you would have to have a 100 Mb internet connection and that's not quite out there yet but coming to a town near you soon
sorry I thought I would clear that up so you can understand the bandwidth you have to what you need to drag the streams/feeds to the ps3 without it timing out, or locking the ps3.
In order for watchtv to work well is reducing the bottle necks and 9 times out of 10 its the networks your end or there's, anyway sorry for long reply but take a look at you connection speeds 1st. How dos your home computers stream feeds and live video dos that always pause and the buffer more? if so that's whats wrong the ps3 times out or just takes time to buffer more data .