[QUOTE=player1]You know the bug that makes soliders stuck in towers when seiging large stone walls? Well here is it. When soliders get stuck, order them to go outside tower and then order back to walls. Repreat that as many times as needed. Every time some solider will get through the tower.[QUOTE]

You can also do this with any unit in any situation. I´ve had cavs that got partially stuck in a breach of a wall, archers that are stuck in "rock-formations" on the battlefield map etc. Stop current order and re-ordering OR move to another location always solves this.