Just thought I'd add that my unit is hanging on boot up as well (1.0.8.7292). Can't really say why, just started happening one day after a week of working fine. I've only had the unit a couple weeks, so I'm not familiar enough with it yet to troubleshoot. I'll read more here about exporting the system or whatever it is you guys are talking about.
Support just messaged me that they started looking into my backup file to find the cause, I'll keep you updated.