The refs were just awful.  I think they hurt the Raiders more than the Titans but they were bad to both teams.  
I agree on the kickoff, that was a big mistake.  The Raiders made about 10 other stupid mistakes, any one of which could have cost them the game too.  Gibson's fumble, C.Bass out of bounds kickoff, a zillion penalties and missed tackles.  The only positive thing is that they played their worst game in a couple of years, on the road, in a loud stadium, against the second best team in the AFC, and still kept it within one score the whole way.  And the run defense continues to be excellent.  I hope Callahan really kicks their tulips this week.