[3.09] An issue is corrected in this software version that
would cause a blank soft key to "remember" the last key press:
Push Menu + Display +
Contrast + Exit.
Then, push Menu + Display + Blank soft key 7.
The Contrast setting is displayed.
This no longer occurs.
Reference: A090924009
Increasing Contrast Increments by 2
[3.09] This software corrects a problem which would cause
the contrast adjust to increment by 2 each time the user pressed VOLUME Up.
The VOLUME Down adjustment worked correctly.