I am also having this issue. I've tried everything mentioned in the post above. I'll try promoting my science officer to Commander when I reach Capt. and see if that works. Rather vauge and most likely a bug.
I am Science commander, boff is Science trill lt.cmdr.
getting new boff train it : didnt work
getting new skill on my boff : didnt work
promoting a new science officer to lt.cmdr : didnt work
Button is grayed out !
Or do i need Commander on my boff? (thank you cryptic for CRYPTIC tooltips if thats the case :p)
You just inspired me to really take my time getting to your level =P Im at lt commander 5 and sounds like I should start reading quest dialogue instead of grinding.. There should be a science officer forum where we can discuss strategies for our bridge crew and skill specs...