In the CS5.5 Shadow/Highlights adjustment pane, if you tab down to the adjustments to Color correction and/or Midtone Contrast, then type in a number, it enters the digits right-to-left, not left to right. e.g. Tab, tab, tab, tab, tab, tab 1, 2..yields a Color Correction of 21, not 12.
I see the behavior you describe, but it is not caused by tabbing. What is going on is after you start typing a value, it adds a Plus (+) to the beginning of your value. This moves the cursor to the left of the first digit you've typed in. All proceeding characters will follow this Plus. So if you click 123 you'll get +231.
The easiest way to avoid this is to add the Plus upon tabbing into these two fields (Color Correction and Midtone Contrast).
As this doesn't happen in PSCS4 (nor on Windows), I'm going to say this is a result of the Carbon to Cocoa switch. I'll let our engineers know.
Thanks. I hope they can fix it for the next update. It gets frustrating having to ADD extra keystrokes to long-familiar routines....kinda like the way they ruined the simplicity of being able to hit the Delete key to clear something in one stroke.