When I first got the GF1 and 20mm, I recall that AF while shooting video was fast and noisy (which was fine with me). Now, AF takes forever though it's a lot quieter. It's become so slow as to be useless. Did I change some setting, or am I just not remembering correctly how it was when I first got it? I have some older videos where it snaps to focus quickly (and audibly), but no more.