That title pretty much explains it. I notice that the rear passenger wheel is leaning in a little bit and was wondering if an alignment would fix that.

 

If it's just that one wheel that is noticeably leaning, I start looking at the control arms for that wheel.
Definitely take the car to get an alignment, they'll be able to tell you what's going on.

Just wondering though... All 4 wheels are the same size, tread, and installed correctly right?

 

They are stock wheels and tires are all the same size

 

 

Any vibrations, pulling to one side or uneven wear on that tire? Keep in mind the rear tires do have afair amount of negative camber...

 

There are signs of uneven wear. You say the rear tires have a fair amount of negative camber but, the rear passenger is more than the driver side....??

 

Have you scheduled an appointment for an alignment yet? The uneven wear will only get worse if you keep driving it.

 

Did this occur after this?

If so you likely have some suspension damage. Prehaps you will be lucky with just an alignment, but expect to have to replace a few pieces. Hopefully there is no damage to the Haldex pieces as well.