San Francisco was anywhere between 3 and a 3.5 point favorite and now is only laying 1.5 due to the fact that Favre, who still has a questionable ankle and hasn't been in camp for a full week, will play. The only positive I see in this is that Minnesota will strengthen their QB rotation for 2 pre-season games.
The negatives are that Harvin may not play, and the 49ers still remember that hail mary from Favre, that cost them a game they feel they should have won. I think that 49er defense just might want to get a piece of him, like maybe an ankle or something... 😮