Superhub
There have been several complaints from users that they experience issues with their remote control freezing and not taking any more input. The WDTV has to be restarted by webend or by unplugging power in order to work again. The symptoms are usually these messages in the debug log:
Jan 1 00:53:51 WDTVLIVE user.warn kernel: ir: buffer full Jan 1 00:53:52 WDTVLIVE user.warn kernel: ir: buffer full
Here are some common problems which lead to this:
IR Interference
If in your room you have a source of IR radiation (heater, other remotes, some plasma TVs), they could interfere with your WDTV remote. The details have been discussed here: http://wdtv.wetpaint.com/page/Remote+Control+Issues#fbid=CCUDgaSx6ka
Virgin Superhub incompatibility
The Virgin Superhub's UPnP advertisment may lockup your WDTV. You can increase this interval to its maximum (1440) to avoid problems. Details are discussed here: http://forum.wdlxtv.com/viewtopic.php?f=32&t=1254&start=50#p37100