Well, most of us seem to be getting them fine, so odds are, it is something on your end. The first thing I would suggest is updating your winrar, they did an updated a while back that forced us to update to open any new files. If that fails, you might want to look into running a virus or spyware checker (Avast and Spybot are free to home users).Can't play it anymore 'cause everytime I want to download the new version I get a corrupted rar.
Tried with 2 different sources (let's say 3 since I tried with megasync app too) but no luck, last time I managed to download a working rar was 0.8.8