SANTA CLARA -- Coach Jim Harbaugh knows as well as anyone how difficult it can be to catch one of Colin Kaepernick's passes.
To a man, Green Bay believes its defense in particular, its team in general, is, well, different than the unit that was pretty much used by the 49ers in the season opener.
Season-ending knee injuries to two of the 49ers' top four wide receivers -- Mario Manningham and Kyle Williams -- opened the door for rookie A.J. Jenkins to make a contribution.
Here's a look at the playing for the 49ers from their 42-13 loss to the Seattle Seahawks on Sunday night:




















