I bought my Pan-Leica 45/2.8 in April 2010, and it has been one of my favorites. Never had a problem with it until today. It worked fine yesterday, but today it wouldn't focus on my GH3. Tried auto focus and manual; nothing. I tried other lenses to make sure it wasn't my GH3, and I tried the 45 on my GF1 without any function. I cleaned the contacts with a soft eraser. Nothing. I found the Panasonic Customer Service website and sent an e-mail off describing the problem. I then gave it one more try, and,naturally, the lens worked fine. Took a few pictures and focus is spot on. Has anyone experienced any similar problems with the 45?