After several members reported a problem with the rear brake line...and mostly the Driver's side I decided to take a look. I see that the "I" end that is attached to the caliper is pointed up much farther then the passenger side and when I jacked it up, this position of the a-arm was pulling on the brake line. I pulled the tire, and with one hand on the line end and a 12mm end wrench on the bolt I loosened it just enough to rotate it to the same angle as the other side...maybe a hair more, then retightened it. No fluid was lost and no air got in as I didn't loosen it that much. I then saw that the little line support block was not in the wrong position to let it slide through easy so I loosened it (10mm), found the best position for it and retightened the mount .
You guys might take a look at yours.