I remember reading somewhere here but could not find it something about rear pads being misaligned and causing a rear brake squeak.
Can anyone tell me what is wrong and how to fix it as sometimes my rear brakes squeak

How much wear is left on the pads? Pads squeak when they are running low.

I dont know how they can be misaligned, but if they are, removing the caliper and putting the pads back in would be the the fix id imagine.