I get a high-pitched squeal from my brakes when I'm backing out of my garage. It only happens then so I don't know if it's only when I'm in reverse, only at low speed, only when cold, etc.

Has anyone else experience this?

I noticed this too. I'm still trying to decide if the reason it's noticeable is because it's in a garage which echos the noise and the engine is not running as I've not noticed it anywhere else.

Two climate control systems, one inside and the other at the tailpipe.

2007 Camry Hybrid (in service June 2006)
Distance: 36187km (22486mi) over 24 mths (ave trip 20 min)
FE: 6.80L/100km (34.6 mpg)
Dealer repairs reqd: none to date

I only notice it when pulling out of the garage, so it's in reverse. However, I still notice it after the car is out of the garage until it comes to a full stop.

I don't hear it on mine. But it sounds like you haven't done any high speed full panic stops yet. Take it out on a back road, get it up to 60, and then hit the brake pedal as hard as you can(make sure no one is behind you ). Repeat that a couple more times. The squeal should then be gone. The brake pads just need to get their glaze worn off. With the TCH regen brake system, you probably haven't really broken in your brake pads leading to the squeal.

Link to My Hybrid Car News Web Page

But I would hate to lose all that kinetic energy as heat.

Actually you're right. I only have 1000 miles on it, have not had any emergencies and have been coasting more and braking gentler than any other car I've owned. I'll give it a shot.

I have 4500 miles on mine and I still hear the high-pitched squeal. I'll mention it when I go in for my first service check-up.

"Some luck lies in not getting what you thought you wanted but getting what you have, which once you have got it you may be smart enough to see is what you would have wanted had you known."
-Garrison Keillor

It's beginning to sound like an undocumented feature.

Possibly your rotors got wet?

I remember reading about this on the Edmunds forum a couple of months ago. Not even sure is it is TCH related or all Camrys. Seems it was determined by the posters as a normal thing. All reported when backing out of the garage.

I think it had something to do with the anti-lock brack system being activated by the computer.

Check it out!

I think you might be thinking of the "clunk" rather than a squeal.

For those that hear the squeal, are you sure it isn't the regenerative braking "whine"? This is the only thing I have heard that might be thought of as a squeal, but I have heard this when driving down the road - not in the garage. Just a thought...