I just got a used 2003 CR-V EX and found this thread because of "the smell" which seems to me to come from both of the right side wheel wells. The rear one seems more prounounced than the front one. It does rain a lot here (Portland, OR).
I'm pretty sure the theory of salt on the exhaust is bogus since we don't use any salt here (and the car has been registered here since it was originally purchased). I also doubt it's the brakes. Just the wrong smell for that (Unless they are locking. I think I'd notice that though).
I'm pretty sure it's the tires that are causing the smell. I'm wondering if it could be a glitch in the AWD causing a slight difference in the speed of the tires (maybe while turning?).
I'd sure like to know what it is. I don't want to have to replace my tires all the time. Anyone notice their tires wearing extra fast on the right side?