Squat, Press, Deadlift Form Check

[WaffleBox]

Howdy folks! This is my second form check request. The first can be found here:

http://startingstrength.com/resource...ad.php?t=39794

My training log can be found here:

http://startingstrength.com/resource...ad.php?t=39815

I am still pretty new to this, having just completed my third week of SS. I'd be grateful for any feedback you have. These videos are all from today's workout.

I tried a couple different camera angles. I'd love some feedback on which ones are most useful so I can use them again in the future.

Issues I am aware of, but could still use some help correcting
Wrists aren't perfectly straight during squats
Press form sucks in general
My back is a little rounded when putting down deadlifts

Squat videos - 170lbs
Set 1: http://www.youtube.com/watch?v=HfKOGp1A9k4
Set 2: http://www.youtube.com/watch?v=13aArBCrtX4
Set 3: http://www.youtube.com/watch?v=DG-BQ_6HuAk

Press videos - 90lbs
Set 1: http://www.youtube.com/watch?v=_7cUQPnoIoc
Set 2: http://www.youtube.com/watch?v=0z0ijXo29u0
Set 3: http://www.youtube.com/watch?v=EcQFDmjYUb8

Deadlift videos - 255lbs*
The first video is a warmup set at 135lbs so you can see my form when I'm not on the verge of death from heavy weights. The work weight set, as you will see, was pretty rough.

Set 1: http://www.youtube.com/watch?v=ZlT0j6KplSE
Set 2: http://www.youtube.com/watch?v=CCdPUSC-S9o

[kessg]

Some observations from a non-expert:
1. Squat - Your bar speed is good, but you squat sort of hunched over; your upper back looks rounded throughout your squat. Is this your normal posture?

2. Press - It looks like you are attempting Rip's Press 2.0, but you are doing hips in reverse. Instead of shooting them forward, and then back to neutral, you shoot your butt back, return to back extension, and then press while your back is over extended. Also, are your knees bent? If yes, that would make it a push-press, which you'd want to avoid. The cue is "Hips - rebound - bar up."

3. Deadlift - Your back is way rounded, as in "this is a back injury waiting to happen." It looks like you set your back correctly in the set-up, but as you begin to lift, the first thing to happen is the rounding of your back.

For my untrained eye, it looks like you lack the ability to consciously control your spinal erectors, and proprioception in general. If you have a starting strength coach in your area, I'd recommend meeting with them for a couple of sessions. You have a nice set up equipment-wise, it'd be a shame to waste it on bad technique.

Hope this was helpful.