Yep - Mine's borked too
A Pace 9F3 SkyHD box which once they rolled out V10 software, keeps crashing every 2-3 days without fail.
Interestingly when it started back in October (box was running REALLY slowly) they knew about the issue and would allow the users with flakey boxes to roll back to the previous software version (V9) but they then updated the over the air version to stop people from rolling back.
(see http://skyepginfo.co.uk/Firmware/SkyPlusHD.php for revisions of software).
I've spoken to sky a couple of times about the issue but their outsourced call centre bods have no clue and just keep telling people to force reset their boxes (which formats the disk and wipes out everything they have on the planner).
I've got to the point where after many years of being a Sky customer and early adopter (and never having a freebie, having paid full cost for not only a Digibox in the old days, but also a Sky+ box and a Sky HD box) I'm now about to jump ship. The Mrs + kids are binge watching anything that is stored on the disk in half term in between crashes.
Sky aren't willing to recompense me in any way - they're not willing to update my box or give me a discounted sub, so I'm off.
No virgin media where I am, however, with Fibre broadband, Netflix, Amazon Prime and a decent Freesat with Freetime+ box (like the Humax HDR-1000S 2Tb) the £200 for the box will have paid for itself in 4 months saving £60 a month. I won't miss the movies (and can get Now TV if I really want to on an Apple TV) and I never had sports anyway.