I also experience many of the issues in this thread on my Duo.
1.) The EPG crashes every other day. I have one source set (OpenTV) and scheduled to download at 4am. Sometimes it works, sometimes it doesn't, and I have to manually re-download. EPG is stored on USB.
2.) Every now and again the box will crash. This will usually happen when powering on from standby and something is recording. Only way out is to reboot.
3.) Sometimes the box is unresponsive to the remote. The only way to get it working is a hard reboot.
4.) Sometimes when powering on from standby a channel will have no sound. If I then change channel it comes back.
Despite all these problems I'm sticking with VIX, frankly because its still the best image regardless of the recent issues. And even though the missus is chewing my ear off about the problems!
Keep up the good work VIX team... I'm hoping for a new improved version soon!