Ok, not quite a cure, but close! I thought I would show you all the little trick install I made months ago. It has proven to be very beneficial for passing, merging, leaving parallel parking spots, and all that... I rarely look over my shoulder anymore!
These can be found at most auto parts stores for around $5 a piece. They don't vibrate going down the road, rough roads don't change their position, they are easily adjustable, and they don't take up valuable outside mirror space. This is the type with a suction cup on the end. I cut off the thin part of the suction cup; leaving a soft thick rubber mounting surface. I then picked where I wanted to mount them and drilled a hole in the A-pillars and put a screw through what was left of the cup.
Put the mirror in place again and hit the road!