Video streaming over network is breaking in-between

[Guest evad]

Another nasty and annoying issue I'm having is that virtually every single video stream over network just drops out in-between. Say I start the video, buffers and plays fine for a while (anywhere between tens of seconds and couple of minutes) and then just stops, with bufferring indicator reaching the end of scale immediately. The only option is to restart video, scroll to the point where it broke, watch another couple of minutes until it breaks again, rinse, repeat. Very frustratimg. It happens with youtube videos, in-browser flash videos, local UPnP server streams, basically any media stream I could imagine (didn't check audio stream, tough).

Anyone else has this too?