The blu-ray freezes 11 times during playback. Studio has admitted the problem and a replacement program should be available soon. Incredibly this was pointed out in an early review an early review yet these discs have got to the customers.
Before I sign off I have to mention a peculiar issue I experienced while watching the film. At various points throughout, probably around a dozen or so times in total, the film briefly froze before carrying on as normal. This issue was not present when playing the BonusView track, which led me to believe that it was a problem with the disc rather than my players. A quick email to Lionsgate confirmed that I had received a check disc from a bad batch, but that all retail copies would be fully quality assured before they hit stores.
Shame that the UK has to suffer again over a Whedon release.
PS. Sounds like a widespread issue although I'm not sure if all discs and players are affected. Apparently playback on a PC is fine.