It's strange in my case... When I first went to school, it was in a rather "rough" area. Not super rough, but with a working class heritage that resulted in a stricter set of social norms. After various over-riding events, I found myself in a school on the other side of the city in a far posher area. In this place, the racial mix was extensive and people were far more accepting of others. It could also be noted that there were a far higher number of geeks, goths, metallers, "Theatre folk" and open homosexuals (a little comment on the nature of class and society, there).
As a result, I have no problem with interracial couples and don't really find it strange. Originating from a setting in which Asian (middle-eastern for you american folk) people were looked down upon thus harbouring a strong racial divide, I did find it a little strange when, at the new school, almost all of my girlfriends were Asian.
I am a fan of interracial relationships. It strengthens the blood.