Up arrow toggles window shadow decoration

[Gene Smith]

Recently I started having a problem with the main "up arrow" key in that 
it stopped working in f21 kde. When pressed it now just toggles the 
window shadow/highlight on/off of the current window and does not have 
the expected scrolling effect. The other main arrow keys work as 
expected. (The arrow keys in the numerical keypad still work as expected.)

The main up arrow key works as expected in a terminal (e.g., after 
pressing ctrl-alt-f2 and logging in).

The kde setting for keyboard had not been touched and was at default 101 
key keyboard. Tried a few other layouts there but it did not affect the 
problem.

Any ideas on how I can fix this?

-gene