game: http://www.wargear.net/games/view/602922

Problem: I was holding on to my reserves, hadn't placed any, had 18 in hand. Used all my attacks and fortifies, and it *required* me to do placement.
Placed 1 unit and Applied.
Screen now indicates I have nothing to do, my Next Waiting Turn icon is lit, and I can't do anything to make it realize it's the next player's turn.

Note: Kjeld (the game designer) noted that the carryover limit on reserves is 13, and I had 17, so that could likely be the problem.

Yes, that is probably the problem. Place units until you are below the limit and then you should be able to end your turn.

Problem is... once I launch the player, I have no options and the status indicator (beside the card values in the top left) states "Waiting for other players to take their turn".

I've put you back into Placement phase so you can place the additional 4 units, that should clear the problem.

Thanks Tom, that did the trick!