Sorry to hear that. I thought the problem must be with the AF sensor --- but in your case looks concerned with lens ...
Could anyone explain why lens could lead to OOF? I guess some glasses were shifted so its focus range become too close?

Thanks for the message. that's good news.

Thanks for the message.
I guess it is not a common problem so probably the best thing I can do is exchanging for another camera.

Anyone else using T2i + 50mm f1.4 and having this focus issues?
hope this is not a design issue, ie the sensor/algorithm for focus is just weak for basic rebel models.

I hope this is a problem only happen to a few cameras, ie it is not a design problem.
I received reply from canon but it does not help.

------------------------
Canon's reply:

Thank you for contacting Canon product support.  We value you as a Canon
customer and appreciate the opportunity to assist you.  I'm sorry to
hear that you are receiving images that are 3-5 cm closer/forward than
you had expected.

There is a possible remedy without sending your camera to a facility for
repair.  All you need is a pencil eraser and a clean dry towel.

    1. Check the camera by taking a picture without the lens attached.


    2. Remove the lens from the camera and use the eraser on the metal
lens                 contacts at the base of the lens.

    3. Wipe the area with a clean dry towel and attach the lens to the
camera.

If your camera is still having the same issue, you will need to service
your camera body and lens.

Hello, pet_chia,

    Just got T2i and I found similar issue with my EF 50mm F1.4 lens: shotting an object about 3-5m away the focus spot is 5/10 cm closer/forward. I did quite some test and this issue is consistent.
    Wonder if you found a reliable solution for this. I set AF to ONE-SHOT,  use single centeral AF point,  set metering mode to be SPOT, and also try to aiming object using the area that a little below the central AF point. I also tried other AF point. None of them really helps. The focus spot is consistently forward/closer.
     When shotting things that is very close, say around 1m, the focus spot is quite accurate.

     I just updated my firmware to 1.08. It is not helpful either. It is difficult to notice this issue using my kit lens (18-135mm) since the maximum aperture is much smaller.

I consider this is a serious issue hope someone could help.
Jeff