Added the year-old Roman Replacement rule modification, which nearly slipped through the cracks.

Replacement - Neither unit involved in a “Replacment” may move or have moved that turn. The unit being backed up before the Replacement occurs must be engaged, and the other unit must be unengaged.
Here's a link to Chad's ruling, for the curious:
http://yourmovegames.com/forum/index.php/topic,1694.msg15094.html#msg15094