Since the most recent update there is a problem with saving PNG transparency. We used to have the transparent layer with a "background" when you turned the background off it would save the PNG but the transparency it would feather into was based on the colours in the original background layer. Now when you save a png it seems to just make up any colours for the background. This is a serious problem as a games developer well underway with our project as we are now having to go through every texture map and graphic in our game and replace them with TGAs. We are losing all the convenience of the PNGS which is our preferred format. It used to work but sometimes would take ages to save the PNG if it was a larger image. Whichever "fix" you implemented has broken it and left us with"fringing" on all our transparent textures. You may never notice the issue unless you start to layer the pngs in a game engine or Maya but for us its a very serious problem. We are currently reverting to old CS2 to get pngs done.