I had the right rear bearing replaced yesterday, and when driving the car afterwards, it feels as if the brakes require more effort to slow the car down. In other words, I need to depress the brake pedal more than before. I know that the mechanic disconnected the rear brake caliper to get to the bearing, and I'm thinking that he did not correctly re-install it.

An additional note: When I started my car up after the bearing was installed, I depressed the brake pedal, and the pedal went all the way down to the floor. I let go of the pedal, then depressed it again, and all of a sudden it was working properly again (that's never happened before). What's going on? Am I just paranoid?

Thanks...