Evade allows a character to to add a movement ability level to his agility and strength until his next turn or until he is held, whichever comes first. A character without one of those abilities can also evade, but his agility and strength do not change.
Here is the new text which should be more clear:
Evade allows a character to add the level of one of his movement abilities to his agility and strength until the end of his next turn or until he is held, whichever comes first. A character with no movement abilities can also evade, allowing him to escape on his next turn if he is not held, but his agility and strength do not change.
We worked hard on these 32 pages for over a year, and we don't expect any more changes like this, but you never know.