Clones are not necessarily the cause of reboots and remember those denigrating clones may sell legit Duos - so they may be just pushing the marketing line.
AFAIK I've got an legitimate Vu+ Duo and it sometimes reboots. So clones are not necessarily the cause.
Because of the HDMI switch-on facility, my TV switches on too. One night I thought I had a break-in because the TV was on downstairs. It took me a two more goes to work out that the 1:00 am scheduled epg download had somehow failed and caused a reboot! Epg now downloads at 8:00 am!
Also since BH 1.7.4 the whole software feels less stable than it once was - 1.6 say. Yesterday, for instance, I switched on to a find purple screen, a notice telling me a programme had been recorded and the whole box locked - not accepting any inputs. A reboot after power removal did nothing apart from remove the purple hue; it still couldn't get past 'starting gui'. In the end I did a complete re-install - third time on this release. So this latest software is a bit flakey; also the BH team seem not to want crash logs as there is no email address for the software to report its failings to. I had 9 crash logs at the last clear-out. All a bit odd if you ask me.
I do pound my box though with asking to stream over the net whilst in stand-by and maybe recording too.