have you tried pausing iplayer for a few minutes during the evening or when you notice the internet connection is slow?
In the past this always worked for me on other Humax boxes when the iplayer/internet connection was slow. There's nothing worse than trying to watch something where it keeps on freezing, pausing it for a short while allowed it to catch up, buffer data and then be watched stutter free.
I've read conflicting reports of whether the dtr1000 buffers or not, some reviews state that a portion of the hard drive is reserved for buffering, other reports state that it doesn't buffer which would explain one of the problems if there's high contention on iplayer
#Barry? if you're around and have time at some point, any chance of you confirming with Humax conclusively whether the dtr1000 buffers or not. I can understand the temptation to return a perfectly good and working dtr1000 to a retailer if it doesn't buffer as you can guarantee iplayer and other services will have problems from time to time if it doesn't. Thanks.