Bug in Season 4 Update - key bindings lost

Like many others, when I downloaded Season 4 it reset my keybinds.  Not them all, mind you, only for infantry; the rest remain unaffected, which is a bit weird.  To add to the problem I couldn't reset the key bindings; when I tried to select the key I wanted to rebind, hovering over the letter had no effect.  I could click on the letter until the cows come home and I wouldn't be able to change the key bind. 

HOWEVER

If I move the cursor to the RIGHT of the key bind letter, suddenly the keybind box changes to BOLD, and I CAN now change the desired keybind.

It's one of those really annoying things that I've spent ages trying to resolve, and now I have, I just wanted to share it in case anyone else is experiencing the same issue.  It seems the actual selection area that you click is not aligned properly with the graphics on the screen.  Boy was that irritating!!!  Hope it is helpful to someone!