I have found the same as others, generally no trouble and not that big.

I have heard one bad story regarding race from a swiss guy, married to a Thai woman. A group of them headed out one night to a club in Biel (sorry cant remember the name) mostly Thai and a few Swiss guys. The bouncer said they had too many 'coloured people' in the club already, and they were denied access. I guess you are going to get idiots like that popping up now and again.