The only major issue I have with the image quality of my Pana GH1 is banding. With high ISO images, or any ISO images which have been underexposed and pushed, banding can be a real problem. The best solution I have found to date is Nik Dfine. The photo below is a recent ISO 1600 (more like ISO 2154 according to DxOmark data) photo I made through thick and dirty glass at a local zoo. Please ignore the reflections, which were unavoidable and do not have anything to do with the GH1 image quality. Subscribe to see EXIF info for this image (if available) Even in this web-sized version, significant banding (both horizontal and vertical) is evident. I then used Dfine to remove the banding and added a bit of contrast in Photoshop. Below is the original, web-sized image again. If you mouseover, you will see the version after processing in Dfine: <img src="https://farm5.static.flickr.com/4033/4466287279_6ec793d6e3_o.jpg" rsrc="https://farm5.static.flickr.com/4014/4467060964_02ced925d9_o.jpg" border="0"> This debanding process does not seem to affect detail. Below is a 100% crop of the above image. Mouseover to see the same crop after debanding and a bit of contrast enhancement. <img src="https://farm3.static.flickr.com/2499/4466416355_18e8d32511_o.jpg" rsrc="https://farm5.static.flickr.com/4016/4467191012_38da6f6790_o.jpg" border="0"> Nik has a 15-day Dfine trial here. Highly recommended if you have an issue with banding. Unfortunately the Dfine plugin is not compatible with 64-bit Photoshop but works in 32-bit PS, Lightroom 2, or Aperture.