Javascript/jQuery: Unable to get proper keyCode when capsLock is ON

I'm trying to determine the proper key/char code in javascript when a key is pressed.
It seems that when the CapsLock key is on, lowercase letters are not detectable.

Try the combinations:
 1. a                 = a (97) shift:false
 2. Shift+A           = A (65) shift:true
 3. Capslock,A        = A (65) shift:false
 4. Capslock, Shift+A = A (65) shift:true  -- this should be 'a'
 

Cases 2 & 4 are indistinguishable.

A simple fiddle to illustrate the problem.
http://jsfiddle.net/sramam/pet5G/3/

OUTPUT:
 keypress 'a' shift:false charCode97 keyCode:97 which:97
 keypress 'A' shift:true charCode65 keyCode:65 which:65
 (CAPSLOCK ON)
 keypress 'A' shift:false charCode65 keyCode:65 which:65
 keypress 'A' shift:true charCode65 keyCode:65 which:65
 

I only have a MacPro(Lion) to try this on.
Is it even possible to detect character to be rendered correctly?

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